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Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse source 
* 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits)
  x86: setup_per_cpu_areas() cleanup
  cpumask: fix compile error when CONFIG_NR_CPUS is not defined
  cpumask: use alloc_cpumask_var_node where appropriate
  cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t
  x86: use cpumask_var_t in acpi/boot.c
  x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids
  sched: put back some stack hog changes that were undone in kernel/sched.c
  x86: enable cpus display of kernel_max and offlined cpus
  ia64: cpumask fix for is_affinity_mask_valid()
  cpumask: convert RCU implementations, fix
  xtensa: define __fls
  mn10300: define __fls
  m32r: define __fls
  h8300: define __fls
  frv: define __fls
  cris: define __fls
  cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
  cpumask: zero extra bits in alloc_cpumask_var_node
  cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/
  cpumask: convert mm/
  ...
This commit is contained in:
Linus Torvalds 2009-01-03 12:04:39 -08:00
commit 7d3b56ba37
112 changed files with 1286 additions and 879 deletions
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48
Documentation/cputopology.txt
View file

@ -31,3 +31,51 @@ not defined by include/asm-XXX/topology.h:
2) core_id: 0
3) thread_siblings: just the given CPU
4) core_siblings: just the given CPU
Additionally, cpu topology information is provided under
/sys/devices/system/cpu and includes these files. The internal
source for the output is in brackets ("[]").
kernel_max: the maximum cpu index allowed by the kernel configuration.
[NR_CPUS-1]
offline: cpus that are not online because they have been
HOTPLUGGED off (see cpu-hotplug.txt) or exceed the limit
of cpus allowed by the kernel configuration (kernel_max
above). [~cpu_online_mask + cpus >= NR_CPUS]
online: cpus that are online and being scheduled [cpu_online_mask]
possible: cpus that have been allocated resources and can be
brought online if they are present. [cpu_possible_mask]
present: cpus that have been identified as being present in the
system. [cpu_present_mask]
The format for the above output is compatible with cpulist_parse()
[see <linux/cpumask.h>]. Some examples follow.
In this example, there are 64 cpus in the system but cpus 32-63 exceed
the kernel max which is limited to 0..31 by the NR_CPUS config option
being 32. Note also that cpus 2 and 4-31 are not online but could be
brought online as they are both present and possible.
kernel_max: 31
offline: 2,4-31,32-63
online: 0-1,3
possible: 0-31
present: 0-31
In this example, the NR_CPUS config option is 128, but the kernel was
started with possible_cpus=144. There are 4 cpus in the system and cpu2
was manually taken offline (and is the only cpu that can be brought
online.)
kernel_max: 127
offline: 2,4-127,128-143
online: 0-1,3
possible: 0-127
present: 0-3
See cpu-hotplug.txt for the possible_cpus=NUM kernel start parameter
as well as more information on the various cpumask's.

17
arch/alpha/include/asm/topology.h
View file

@ -39,7 +39,24 @@ static inline cpumask_t node_to_cpumask(int node)
return node_cpu_mask;
}
extern struct cpumask node_to_cpumask_map[];
/* FIXME: This is dumb, recalculating every time. But simple. */
static const struct cpumask *cpumask_of_node(int node)
{
int cpu;
cpumask_clear(&node_to_cpumask_map[node]);
for_each_online_cpu(cpu) {
if (cpu_to_node(cpu) == node)
cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
}
return &node_to_cpumask_map[node];
}
#define pcibus_to_cpumask(bus) (cpu_online_map)
#define cpumask_of_pcibus(bus) (cpu_online_mask)
#endif /* !CONFIG_NUMA */
# include <asm-generic/topology.h>

3
arch/alpha/kernel/irq.c
View file

@ -50,7 +50,8 @@ int irq_select_affinity(unsigned int irq)
if (!irq_desc[irq].chip->set_affinity || irq_user_affinity[irq])
return 1;
while (!cpu_possible(cpu) || !cpu_isset(cpu, irq_default_affinity))
while (!cpu_possible(cpu) ||
!cpumask_test_cpu(cpu, irq_default_affinity))
cpu = (cpu < (NR_CPUS-1) ? cpu + 1 : 0);
last_cpu = cpu;

5
arch/alpha/kernel/setup.c
View file

@ -79,6 +79,11 @@ int alpha_l3_cacheshape;
unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
#endif
#ifdef CONFIG_NUMA
struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_to_cpumask_map);
#endif
/* Which processor we booted from. */
int boot_cpuid;

5
arch/avr32/include/asm/bitops.h
View file

@ -263,6 +263,11 @@ static inline int fls(unsigned long word)
return 32 - result;
}
static inline int __fls(unsigned long word)
{
return fls(word) - 1;
}
unsigned long find_first_zero_bit(const unsigned long *addr,
unsigned long size);
unsigned long find_next_zero_bit(const unsigned long *addr,

1
arch/blackfin/include/asm/bitops.h
View file

@ -213,6 +213,7 @@ static __inline__ int __test_bit(int nr, const void *addr)
#endif /* __KERNEL__ */
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#endif /* _BLACKFIN_BITOPS_H */

1
arch/cris/include/asm/bitops.h
View file

@ -148,6 +148,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
#define ffs kernel_ffs
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/find.h>

1
arch/h8300/include/asm/bitops.h
View file

@ -207,6 +207,7 @@ static __inline__ unsigned long __ffs(unsigned long word)
#endif /* __KERNEL__ */
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#endif /* _H8300_BITOPS_H */

2
arch/ia64/include/asm/irq.h
View file

@ -27,7 +27,7 @@ irq_canonicalize (int irq)
}
extern void set_irq_affinity_info (unsigned int irq, int dest, int redir);
bool is_affinity_mask_valid(cpumask_t cpumask);
bool is_affinity_mask_valid(cpumask_var_t cpumask);
#define is_affinity_mask_valid is_affinity_mask_valid

9
arch/ia64/include/asm/topology.h
View file

@ -34,6 +34,7 @@
* Returns a bitmask of CPUs on Node 'node'.
*/
#define node_to_cpumask(node) (node_to_cpu_mask[node])
#define cpumask_of_node(node) (&node_to_cpu_mask[node])
/*
* Returns the number of the node containing Node 'nid'.
@ -45,7 +46,7 @@
/*
* Returns the number of the first CPU on Node 'node'.
*/
#define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))
#define node_to_first_cpu(node) (cpumask_first(cpumask_of_node(node)))
/*
* Determines the node for a given pci bus
@ -109,6 +110,8 @@ void build_cpu_to_node_map(void);
#define topology_core_id(cpu) (cpu_data(cpu)->core_id)
#define topology_core_siblings(cpu) (cpu_core_map[cpu])
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
#define topology_thread_cpumask(cpu) (&per_cpu(cpu_sibling_map, cpu))
#define smt_capable() (smp_num_siblings > 1)
#endif
@ -119,6 +122,10 @@ extern void arch_fix_phys_package_id(int num, u32 slot);
node_to_cpumask(pcibus_to_node(bus)) \
)
#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
cpu_all_mask : \
cpumask_from_node(pcibus_to_node(bus)))
#include <asm-generic/topology.h>
#endif /* _ASM_IA64_TOPOLOGY_H */

3
arch/ia64/kernel/acpi.c
View file

@ -202,7 +202,6 @@ char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
Boot-time Table Parsing
-------------------------------------------------------------------------- */
static int total_cpus __initdata;
static int available_cpus __initdata;
struct acpi_table_madt *acpi_madt __initdata;
static u8 has_8259;
@ -1001,7 +1000,7 @@ acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
node = pxm_to_node(pxm);
if (node >= MAX_NUMNODES || !node_online(node) ||
cpus_empty(node_to_cpumask(node)))
cpumask_empty(cpumask_of_node(node)))
return AE_OK;
/* We know a gsi to node mapping! */

23
arch/ia64/kernel/iosapic.c
View file

@ -695,32 +695,31 @@ get_target_cpu (unsigned int gsi, int irq)
#ifdef CONFIG_NUMA
{
int num_cpus, cpu_index, iosapic_index, numa_cpu, i = 0;
cpumask_t cpu_mask;
const struct cpumask *cpu_mask;
iosapic_index = find_iosapic(gsi);
if (iosapic_index < 0 ||
iosapic_lists[iosapic_index].node == MAX_NUMNODES)
goto skip_numa_setup;
cpu_mask = node_to_cpumask(iosapic_lists[iosapic_index].node);
cpus_and(cpu_mask, cpu_mask, domain);
for_each_cpu_mask(numa_cpu, cpu_mask) {
if (!cpu_online(numa_cpu))
cpu_clear(numa_cpu, cpu_mask);
cpu_mask = cpumask_of_node(iosapic_lists[iosapic_index].node);
num_cpus = 0;
for_each_cpu_and(numa_cpu, cpu_mask, &domain) {
if (cpu_online(numa_cpu))
num_cpus++;
}
num_cpus = cpus_weight(cpu_mask);
if (!num_cpus)
goto skip_numa_setup;
/* Use irq assignment to distribute across cpus in node */
cpu_index = irq % num_cpus;
for (numa_cpu = first_cpu(cpu_mask) ; i < cpu_index ; i++)
numa_cpu = next_cpu(numa_cpu, cpu_mask);
for_each_cpu_and(numa_cpu, cpu_mask, &domain)
if (cpu_online(numa_cpu) && i++ >= cpu_index)
break;
if (numa_cpu != NR_CPUS)
if (numa_cpu < nr_cpu_ids)
return cpu_physical_id(numa_cpu);
}
skip_numa_setup:
@ -731,7 +730,7 @@ skip_numa_setup:
* case of NUMA.)
*/
do {
if (++cpu >= NR_CPUS)
if (++cpu >= nr_cpu_ids)
cpu = 0;
} while (!cpu_online(cpu) || !cpu_isset(cpu, domain));

4
arch/ia64/kernel/irq.c
View file

@ -112,11 +112,11 @@ void set_irq_affinity_info (unsigned int irq, int hwid, int redir)
}
}
bool is_affinity_mask_valid(cpumask_t cpumask)
bool is_affinity_mask_valid(cpumask_var_t cpumask)
{
if (ia64_platform_is("sn2")) {
/* Only allow one CPU to be specified in the smp_affinity mask */
if (cpus_weight(cpumask) != 1)
if (cpumask_weight(cpumask) != 1)
return false;
}
return true;

27
arch/ia64/sn/kernel/sn2/sn_hwperf.c
View file

@ -385,7 +385,6 @@ static int sn_topology_show(struct seq_file *s, void *d)
int j;
const char *slabname;
int ordinal;
cpumask_t cpumask;
char slice;
struct cpuinfo_ia64 *c;
struct sn_hwperf_port_info *ptdata;
@ -473,23 +472,21 @@ static int sn_topology_show(struct seq_file *s, void *d)
* CPUs on this node, if any
*/
if (!SN_HWPERF_IS_IONODE(obj)) {
cpumask = node_to_cpumask(ordinal);
for_each_online_cpu(i) {
if (cpu_isset(i, cpumask)) {
slice = 'a' + cpuid_to_slice(i);
c = cpu_data(i);
seq_printf(s, "cpu %d %s%c local"
" freq %luMHz, arch ia64",
i, obj->location, slice,
c->proc_freq / 1000000);
for_each_online_cpu(j) {
seq_printf(s, j ? ":%d" : ", dist %d",
node_distance(
for_each_cpu_and(i, cpu_online_mask,
cpumask_of_node(ordinal)) {
slice = 'a' + cpuid_to_slice(i);
c = cpu_data(i);
seq_printf(s, "cpu %d %s%c local"
" freq %luMHz, arch ia64",
i, obj->location, slice,
c->proc_freq / 1000000);
for_each_online_cpu(j) {
seq_printf(s, j ? ":%d" : ", dist %d",
node_distance(
cpu_to_node(i),
cpu_to_node(j)));
}
seq_putc(s, '\n');
}
seq_putc(s, '\n');
}
}
}

2
arch/m32r/kernel/smpboot.c
View file

@ -592,7 +592,7 @@ int setup_profiling_timer(unsigned int multiplier)
* accounting. At that time they also adjust their APIC timers
* accordingly.
*/
for (i = 0; i < NR_CPUS; ++i)
for_each_possible_cpu(i)
per_cpu(prof_multiplier, i) = multiplier;
return 0;

1
arch/m68knommu/include/asm/bitops.h
View file

@ -331,6 +331,7 @@ found_middle:
#endif /* __KERNEL__ */
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#endif /* _M68KNOMMU_BITOPS_H */

4
arch/mips/include/asm/mach-ip27/topology.h
View file

@ -25,11 +25,13 @@ extern struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
#define cpu_to_node(cpu) (sn_cpu_info[(cpu)].p_nodeid)
#define parent_node(node) (node)
#define node_to_cpumask(node) (hub_data(node)->h_cpus)
#define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))
#define cpumask_of_node(node) (&hub_data(node)->h_cpus)
#define node_to_first_cpu(node) (cpumask_first(cpumask_of_node(node)))
struct pci_bus;
extern int pcibus_to_node(struct pci_bus *);
#define pcibus_to_cpumask(bus) (cpu_online_map)
#define cpumask_of_pcibus(bus) (cpu_online_mask)
extern unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];

2
arch/parisc/include/asm/smp.h
View file

@ -16,8 +16,6 @@
#include <linux/cpumask.h>
typedef unsigned long address_t;
extern cpumask_t cpu_online_map;
/*
* Private routines/data

12
arch/powerpc/include/asm/topology.h
View file

@ -22,11 +22,11 @@ static inline cpumask_t node_to_cpumask(int node)
return numa_cpumask_lookup_table[node];
}
#define cpumask_of_node(node) (&numa_cpumask_lookup_table[node])
static inline int node_to_first_cpu(int node)
{
cpumask_t tmp;
tmp = node_to_cpumask(node);
return first_cpu(tmp);
return cpumask_first(cpumask_of_node(node));
}
int of_node_to_nid(struct device_node *device);
@ -46,6 +46,10 @@ static inline int pcibus_to_node(struct pci_bus *bus)
node_to_cpumask(pcibus_to_node(bus)) \
)
#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
cpu_all_mask : \
cpumask_of_node(pcibus_to_node(bus)))
/* sched_domains SD_NODE_INIT for PPC64 machines */
#define SD_NODE_INIT (struct sched_domain) { \
.parent = NULL, \
@ -108,6 +112,8 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev,
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_thread_cpumask(cpu) (&per_cpu(cpu_sibling_map, cpu))
#define topology_core_cpumask(cpu) (&per_cpu(cpu_core_map, cpu))
#define topology_core_id(cpu) (cpu_to_core_id(cpu))
#endif
#endif

6
arch/powerpc/platforms/cell/spu_priv1_mmio.c
View file

@ -80,10 +80,10 @@ static void cpu_affinity_set(struct spu *spu, int cpu)
u64 route;
if (nr_cpus_node(spu->node)) {
cpumask_t spumask = node_to_cpumask(spu->node);
cpumask_t cpumask = node_to_cpumask(cpu_to_node(cpu));
const struct cpumask *spumask = cpumask_of_node(spu->node),
*cpumask = cpumask_of_node(cpu_to_node(cpu));
if (!cpus_intersects(spumask, cpumask))
if (!cpumask_intersects(spumask, cpumask))
return;
}

4
arch/powerpc/platforms/cell/spufs/sched.c
View file

@ -166,9 +166,9 @@ void spu_update_sched_info(struct spu_context *ctx)
static int __node_allowed(struct spu_context *ctx, int node)
{
if (nr_cpus_node(node)) {
cpumask_t mask = node_to_cpumask(node);
const struct cpumask *mask = cpumask_of_node(node);
if (cpus_intersects(mask, ctx->cpus_allowed))
if (cpumask_intersects(mask, &ctx->cpus_allowed))
return 1;
}

2
arch/s390/include/asm/topology.h
View file

@ -6,10 +6,12 @@
#define mc_capable() (1)
cpumask_t cpu_coregroup_map(unsigned int cpu);
const struct cpumask *cpu_coregroup_mask(unsigned int cpu);
extern cpumask_t cpu_core_map[NR_CPUS];
#define topology_core_siblings(cpu) (cpu_core_map[cpu])
#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
int topology_set_cpu_management(int fc);
void topology_schedule_update(void);

5
arch/s390/kernel/topology.c
View file

@ -97,6 +97,11 @@ cpumask_t cpu_coregroup_map(unsigned int cpu)
return mask;
}
const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
{
return &cpu_core_map[cpu];
}
static void add_cpus_to_core(struct tl_cpu *tl_cpu, struct core_info *core)
{
unsigned int cpu;

1
arch/sh/include/asm/topology.h
View file

@ -32,6 +32,7 @@
#define parent_node(node) ((void)(node),0)
#define node_to_cpumask(node) ((void)node, cpu_online_map)
#define cpumask_of_node(node) ((void)node, cpu_online_mask)
#define node_to_first_cpu(node) ((void)(node),0)
#define pcibus_to_node(bus) ((void)(bus), -1)

13
arch/sparc/include/asm/topology_64.h
View file

@ -16,8 +16,12 @@ static inline cpumask_t node_to_cpumask(int node)
{
return numa_cpumask_lookup_table[node];
}
#define cpumask_of_node(node) (&numa_cpumask_lookup_table[node])
/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
/*
* Returns a pointer to the cpumask of CPUs on Node 'node'.
* Deprecated: use "const struct cpumask *mask = cpumask_of_node(node)"
*/
#define node_to_cpumask_ptr(v, node) \
cpumask_t *v = &(numa_cpumask_lookup_table[node])
@ -26,9 +30,7 @@ static inline cpumask_t node_to_cpumask(int node)
static inline int node_to_first_cpu(int node)
{
cpumask_t tmp;
tmp = node_to_cpumask(node);
return first_cpu(tmp);
return cpumask_first(cpumask_of_node(node));
}
struct pci_bus;
@ -77,10 +79,13 @@ static inline int pcibus_to_node(struct pci_bus *pbus)
#define topology_core_id(cpu) (cpu_data(cpu).core_id)
#define topology_core_siblings(cpu) (cpu_core_map[cpu])
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
#define topology_thread_cpumask(cpu) (&per_cpu(cpu_sibling_map, cpu))
#define mc_capable() (sparc64_multi_core)
#define smt_capable() (sparc64_multi_core)
#endif /* CONFIG_SMP */
#define cpu_coregroup_map(cpu) (cpu_core_map[cpu])
#define cpu_coregroup_mask(cpu) (&cpu_core_map[cpu])
#endif /* _ASM_SPARC64_TOPOLOGY_H */

2
arch/sparc/kernel/of_device_64.c
View file

@ -778,7 +778,7 @@ static unsigned int __init build_one_device_irq(struct of_device *op,
out:
nid = of_node_to_nid(dp);
if (nid != -1) {
cpumask_t numa_mask = node_to_cpumask(nid);
cpumask_t numa_mask = *cpumask_of_node(nid);
irq_set_affinity(irq, &numa_mask);
}

2
arch/sparc/kernel/pci_msi.c
View file

@ -286,7 +286,7 @@ static int bringup_one_msi_queue(struct pci_pbm_info *pbm,
nid = pbm->numa_node;
if (nid != -1) {
cpumask_t numa_mask = node_to_cpumask(nid);
cpumask_t numa_mask = *cpumask_of_node(nid);
irq_set_affinity(irq, &numa_mask);
}

32
arch/x86/include/asm/es7000/apic.h
View file

@ -157,7 +157,7 @@ cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
num_bits_set = cpumask_weight(cpumask);
/* Return id to all */
if (num_bits_set == NR_CPUS)
if (num_bits_set == nr_cpu_ids)
return 0xFF;
/*
* The cpus in the mask must all be on the apic cluster. If are not
@ -190,7 +190,7 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask)
num_bits_set = cpus_weight(*cpumask);
/* Return id to all */
if (num_bits_set == NR_CPUS)
if (num_bits_set == nr_cpu_ids)
return cpu_to_logical_apicid(0);
/*
* The cpus in the mask must all be on the apic cluster. If are not
@ -218,9 +218,6 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask)
static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask,
const struct cpumask *andmask)
{
int num_bits_set;
int cpus_found = 0;
int cpu;
int apicid = cpu_to_logical_apicid(0);
cpumask_var_t cpumask;
@ -229,31 +226,8 @@ static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask,
cpumask_and(cpumask, inmask, andmask);
cpumask_and(cpumask, cpumask, cpu_online_mask);
apicid = cpu_mask_to_apicid(cpumask);
num_bits_set = cpumask_weight(cpumask);
/* Return id to all */
if (num_bits_set == NR_CPUS)
goto exit;
/*
* The cpus in the mask must all be on the apic cluster. If are not
* on the same apicid cluster return default value of TARGET_CPUS.
*/
cpu = cpumask_first(cpumask);
apicid = cpu_to_logical_apicid(cpu);
while (cpus_found < num_bits_set) {
if (cpumask_test_cpu(cpu, cpumask)) {
int new_apicid = cpu_to_logical_apicid(cpu);
if (apicid_cluster(apicid) !=
apicid_cluster(new_apicid)){
printk ("%s: Not a valid mask!\n", __func__);
return cpu_to_logical_apicid(0);
}
apicid = new_apicid;
cpus_found++;
}
cpu++;
}
exit:
free_cpumask_var(cpumask);
return apicid;
}

2
arch/x86/include/asm/lguest.h
View file

@ -15,7 +15,7 @@
#define SHARED_SWITCHER_PAGES \
DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE)
/* Pages for switcher itself, then two pages per cpu */
#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS)
#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * nr_cpu_ids)
/* We map at -4M for ease of mapping into the guest (one PTE page). */
#define SWITCHER_ADDR 0xFFC00000

4
arch/x86/include/asm/numaq/apic.h
View file

@ -63,8 +63,8 @@ static inline physid_mask_t ioapic_phys_id_map(physid_mask_t phys_map)
extern u8 cpu_2_logical_apicid[];
static inline int cpu_to_logical_apicid(int cpu)
{
if (cpu >= NR_CPUS)
return BAD_APICID;
if (cpu >= nr_cpu_ids)
return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
}

10
arch/x86/include/asm/pci.h
View file

@ -102,9 +102,9 @@ extern void pci_iommu_alloc(void);
#ifdef CONFIG_NUMA
/* Returns the node based on pci bus */
static inline int __pcibus_to_node(struct pci_bus *bus)
static inline int __pcibus_to_node(const struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
const struct pci_sysdata *sd = bus->sysdata;
return sd->node;
}
@ -113,6 +113,12 @@ static inline cpumask_t __pcibus_to_cpumask(struct pci_bus *bus)
{
return node_to_cpumask(__pcibus_to_node(bus));
}
static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus *bus)
{
return cpumask_of_node(__pcibus_to_node(bus));
}
#endif
#endif /* _ASM_X86_PCI_H */

42
arch/x86/include/asm/summit/apic.h
View file

@ -52,7 +52,7 @@ static inline void init_apic_ldr(void)
int i;
/* Create logical APIC IDs by counting CPUs already in cluster. */
for (count = 0, i = NR_CPUS; --i >= 0; ) {
for (count = 0, i = nr_cpu_ids; --i >= 0; ) {
lid = cpu_2_logical_apicid[i];
if (lid != BAD_APICID && apicid_cluster(lid) == my_cluster)
++count;
@ -97,8 +97,8 @@ static inline int apicid_to_node(int logical_apicid)
static inline int cpu_to_logical_apicid(int cpu)
{
#ifdef CONFIG_SMP
if (cpu >= NR_CPUS)
return BAD_APICID;
if (cpu >= nr_cpu_ids)
return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
#else
return logical_smp_processor_id();
@ -107,7 +107,7 @@ static inline int cpu_to_logical_apicid(int cpu)
static inline int cpu_present_to_apicid(int mps_cpu)
{
if (mps_cpu < NR_CPUS)
if (mps_cpu < nr_cpu_ids)
return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
else
return BAD_APICID;
@ -146,7 +146,7 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask)
num_bits_set = cpus_weight(*cpumask);
/* Return id to all */
if (num_bits_set == NR_CPUS)
if (num_bits_set >= nr_cpu_ids)
return (int) 0xFF;
/*
* The cpus in the mask must all be on the apic cluster. If are not
@ -173,42 +173,16 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask)
static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask,
const struct cpumask *andmask)
{
int num_bits_set;
int cpus_found = 0;
int cpu;
int apicid = 0xFF;
int apicid = cpu_to_logical_apicid(0);
cpumask_var_t cpumask;
if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
return (int) 0xFF;
return apicid;
cpumask_and(cpumask, inmask, andmask);
cpumask_and(cpumask, cpumask, cpu_online_mask);
apicid = cpu_mask_to_apicid(cpumask);
num_bits_set = cpumask_weight(cpumask);
/* Return id to all */
if (num_bits_set == nr_cpu_ids)
goto exit;
/*
* The cpus in the mask must all be on the apic cluster. If are not
* on the same apicid cluster return default value of TARGET_CPUS.
*/
cpu = cpumask_first(cpumask);
apicid = cpu_to_logical_apicid(cpu);
while (cpus_found < num_bits_set) {
if (cpumask_test_cpu(cpu, cpumask)) {
int new_apicid = cpu_to_logical_apicid(cpu);
if (apicid_cluster(apicid) !=
apicid_cluster(new_apicid)){
printk ("%s: Not a valid mask!\n", __func__);
return 0xFF;
}
apicid = apicid | new_apicid;
cpus_found++;
}
cpu++;
}
exit:
free_cpumask_var(cpumask);
return apicid;
}

36
arch/x86/include/asm/topology.h
View file

@ -61,13 +61,19 @@ static inline int cpu_to_node(int cpu)
*
* Side note: this function creates the returned cpumask on the stack
* so with a high NR_CPUS count, excessive stack space is used. The
* node_to_cpumask_ptr function should be used whenever possible.
* cpumask_of_node function should be used whenever possible.
*/
static inline cpumask_t node_to_cpumask(int node)
{
return node_to_cpumask_map[node];
}
/* Returns a bitmask of CPUs on Node 'node'. */
static inline const struct cpumask *cpumask_of_node(int node)
{
return &node_to_cpumask_map[node];
}
#else /* CONFIG_X86_64 */
/* Mappings between node number and cpus on that node. */
@ -82,7 +88,7 @@ DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
extern int cpu_to_node(int cpu);
extern int early_cpu_to_node(int cpu);
extern const cpumask_t *_node_to_cpumask_ptr(int node);
extern const cpumask_t *cpumask_of_node(int node);
extern cpumask_t node_to_cpumask(int node);
#else /* !CONFIG_DEBUG_PER_CPU_MAPS */
@ -103,7 +109,7 @@ static inline int early_cpu_to_node(int cpu)
}
/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
static inline const cpumask_t *_node_to_cpumask_ptr(int node)
static inline const cpumask_t *cpumask_of_node(int node)
{
return &node_to_cpumask_map[node];
}
@ -116,12 +122,15 @@ static inline cpumask_t node_to_cpumask(int node)
#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
/* Replace default node_to_cpumask_ptr with optimized version */
/*
* Replace default node_to_cpumask_ptr with optimized version
* Deprecated: use "const struct cpumask *mask = cpumask_of_node(node)"
*/
#define node_to_cpumask_ptr(v, node) \
const cpumask_t *v = _node_to_cpumask_ptr(node)
const cpumask_t *v = cpumask_of_node(node)
#define node_to_cpumask_ptr_next(v, node) \
v = _node_to_cpumask_ptr(node)
v = cpumask_of_node(node)
#endif /* CONFIG_X86_64 */
@ -187,7 +196,7 @@ extern int __node_distance(int, int);
#define cpu_to_node(cpu) 0
#define early_cpu_to_node(cpu) 0
static inline const cpumask_t *_node_to_cpumask_ptr(int node)
static inline const cpumask_t *cpumask_of_node(int node)
{
return &cpu_online_map;
}
@ -200,12 +209,15 @@ static inline int node_to_first_cpu(int node)
return first_cpu(cpu_online_map);
}
/* Replace default node_to_cpumask_ptr with optimized version */
/*
* Replace default node_to_cpumask_ptr with optimized version
* Deprecated: use "const struct cpumask *mask = cpumask_of_node(node)"
*/
#define node_to_cpumask_ptr(v, node) \
const cpumask_t *v = _node_to_cpumask_ptr(node)
const cpumask_t *v = cpumask_of_node(node)
#define node_to_cpumask_ptr_next(v, node) \
v = _node_to_cpumask_ptr(node)
v = cpumask_of_node(node)
#endif
#include <asm-generic/topology.h>
@ -214,12 +226,12 @@ static inline int node_to_first_cpu(int node)
/* Returns the number of the first CPU on Node 'node'. */
static inline int node_to_first_cpu(int node)
{
node_to_cpumask_ptr(mask, node);
return first_cpu(*mask);
return cpumask_first(cpumask_of_node(node));
}
#endif
extern cpumask_t cpu_coregroup_map(int cpu);
extern const struct cpumask *cpu_coregroup_mask(int cpu);
#ifdef ENABLE_TOPO_DEFINES
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)

31
arch/x86/kernel/acpi/boot.c
View file

@ -538,9 +538,10 @@ static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_madt_local_apic *lapic;
cpumask_t tmp_map, new_map;
cpumask_var_t tmp_map, new_map;
u8 physid;
int cpu;
int retval = -ENOMEM;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
return -EINVAL;
@ -569,23 +570,37 @@ static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
buffer.length = ACPI_ALLOCATE_BUFFER;
buffer.pointer = NULL;
tmp_map = cpu_present_map;
if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out;
if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
goto free_tmp_map;
cpumask_copy(tmp_map, cpu_present_mask);
acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
/*
* If mp_register_lapic successfully generates a new logical cpu
* number, then the following will get us exactly what was mapped
*/
cpus_andnot(new_map, cpu_present_map, tmp_map);
if (cpus_empty(new_map)) {
cpumask_andnot(new_map, cpu_present_mask, tmp_map);
if (cpumask_empty(new_map)) {
printk ("Unable to map lapic to logical cpu number\n");
return -EINVAL;
retval = -EINVAL;
goto free_new_map;
}
cpu = first_cpu(new_map);
cpu = cpumask_first(new_map);
*pcpu = cpu;
return 0;
retval = 0;
free_new_map:
free_cpumask_var(new_map);
free_tmp_map:
free_cpumask_var(tmp_map);
out:
return retval;
}
/* wrapper to silence section mismatch warning */
@ -598,7 +613,7 @@ EXPORT_SYMBOL(acpi_map_lsapic);
int acpi_unmap_lsapic(int cpu)
{
per_cpu(x86_cpu_to_apicid, cpu) = -1;
cpu_clear(cpu, cpu_present_map);
set_cpu_present(cpu, false);
num_processors--;
return (0);

4
arch/x86/kernel/apic.c
View file

@ -140,7 +140,7 @@ static int lapic_next_event(unsigned long delta,
struct clock_event_device *evt);
static void lapic_timer_setup(enum clock_event_mode mode,
struct clock_event_device *evt);
static void lapic_timer_broadcast(const cpumask_t *mask);
static void lapic_timer_broadcast(const struct cpumask *mask);
static void apic_pm_activate(void);
/*
@ -453,7 +453,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
/*
* Local APIC timer broadcast function
*/
static void lapic_timer_broadcast(const cpumask_t *mask)
static void lapic_timer_broadcast(const struct cpumask *mask)
{
#ifdef CONFIG_SMP
send_IPI_mask(mask, LOCAL_TIMER_VECTOR);

2
arch/x86/kernel/cpu/common.c
View file

@ -355,7 +355,7 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c)
printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
} else if (smp_num_siblings > 1) {
if (smp_num_siblings > NR_CPUS) {
if (smp_num_siblings > nr_cpu_ids) {
printk(KERN_WARNING "CPU: Unsupported number of siblings %d",
smp_num_siblings);
smp_num_siblings = 1;

28
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
View file

@ -517,6 +517,17 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
}
}
static void free_acpi_perf_data(void)
{
unsigned int i;
/* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */
for_each_possible_cpu(i)
free_cpumask_var(per_cpu_ptr(acpi_perf_data, i)
->shared_cpu_map);
free_percpu(acpi_perf_data);
}
/*
* acpi_cpufreq_early_init - initialize ACPI P-States library
*
@ -527,6 +538,7 @@ acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
*/
static int __init acpi_cpufreq_early_init(void)
{
unsigned int i;
dprintk("acpi_cpufreq_early_init\n");
acpi_perf_data = alloc_percpu(struct acpi_processor_performance);
@ -534,6 +546,16 @@ static int __init acpi_cpufreq_early_init(void)
dprintk("Memory allocation error for acpi_perf_data.\n");
return -ENOMEM;
}
for_each_possible_cpu(i) {
if (!alloc_cpumask_var_node(
&per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map,
GFP_KERNEL, cpu_to_node(i))) {
/* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
free_acpi_perf_data();
return -ENOMEM;
}
}
/* Do initialization in ACPI core */
acpi_processor_preregister_performance(acpi_perf_data);
@ -604,9 +626,9 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
policy->cpus = perf->shared_cpu_map;
cpumask_copy(&policy->cpus, perf->shared_cpu_map);
}
policy->related_cpus = perf->shared_cpu_map;
cpumask_copy(&policy->related_cpus, perf->shared_cpu_map);
#ifdef CONFIG_SMP
dmi_check_system(sw_any_bug_dmi_table);
@ -795,7 +817,7 @@ static int __init acpi_cpufreq_init(void)
ret = cpufreq_register_driver(&acpi_cpufreq_driver);
if (ret)
free_percpu(acpi_perf_data);
free_acpi_perf_data();
return ret;
}

9
arch/x86/kernel/cpu/cpufreq/powernow-k7.c
View file

@ -310,6 +310,12 @@ static int powernow_acpi_init(void)
goto err0;
}
if (!alloc_cpumask_var(&acpi_processor_perf->shared_cpu_map,
GFP_KERNEL)) {
retval = -ENOMEM;
goto err05;
}
if (acpi_processor_register_performance(acpi_processor_perf, 0)) {
retval = -EIO;
goto err1;
@ -412,6 +418,8 @@ static int powernow_acpi_init(void)
err2:
acpi_processor_unregister_performance(acpi_processor_perf, 0);
err1:
free_cpumask_var(acpi_processor_perf->shared_cpu_map);
err05:
kfree(acpi_processor_perf);
err0:
printk(KERN_WARNING PFX "ACPI perflib can not be used in this platform\n");
@ -652,6 +660,7 @@ static int powernow_cpu_exit (struct cpufreq_policy *policy) {
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
if (acpi_processor_perf) {
acpi_processor_unregister_performance(acpi_processor_perf, 0);
free_cpumask_var(acpi_processor_perf->shared_cpu_map);
kfree(acpi_processor_perf);
}
#endif

24
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View file

@ -766,7 +766,7 @@ static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
{
struct cpufreq_frequency_table *powernow_table;
int ret_val;
int ret_val = -ENODEV;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
dprintk("register performance failed: bad ACPI data\n");
@ -815,6 +815,13 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
if (!alloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
printk(KERN_ERR PFX
"unable to alloc powernow_k8_data cpumask\n");
ret_val = -ENOMEM;
goto err_out_mem;
}
return 0;
err_out_mem:
@ -826,7 +833,7 @@ err_out:
/* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
data->acpi_data.state_count = 0;
return -ENODEV;
return ret_val;
}
static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table)
@ -929,6 +936,7 @@ static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
{
if (data->acpi_data.state_count)
acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
free_cpumask_var(data->acpi_data.shared_cpu_map);
}
#else
@ -1134,7 +1142,8 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
data->cpu = pol->cpu;
data->currpstate = HW_PSTATE_INVALID;
if (powernow_k8_cpu_init_acpi(data)) {
rc = powernow_k8_cpu_init_acpi(data);
if (rc) {
/*
* Use the PSB BIOS structure. This is only availabe on
* an UP version, and is deprecated by AMD.
@ -1152,20 +1161,17 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
"ACPI maintainers and complain to your BIOS "
"vendor.\n");
#endif
kfree(data);
return -ENODEV;
goto err_out;
}
if (pol->cpu != 0) {
printk(KERN_ERR FW_BUG PFX "No ACPI _PSS objects for "
"CPU other than CPU0. Complain to your BIOS "
"vendor.\n");
kfree(data);
return -ENODEV;
goto err_out;
}
rc = find_psb_table(data);
if (rc) {
kfree(data);
return -ENODEV;
goto err_out;
}
}

2
arch/x86/kernel/cpu/intel_cacheinfo.c
View file

@ -534,7 +534,7 @@ static void __cpuinit free_cache_attributes(unsigned int cpu)
per_cpu(cpuid4_info, cpu) = NULL;
}
static void get_cpu_leaves(void *_retval)
static void __cpuinit get_cpu_leaves(void *_retval)
{
int j, *retval = _retval, cpu = smp_processor_id();

2
arch/x86/kernel/cpuid.c
View file

@ -121,7 +121,7 @@ static int cpuid_open(struct inode *inode, struct file *file)
lock_kernel();
cpu = iminor(file->f_path.dentry->d_inode);
if (cpu >= NR_CPUS || !cpu_online(cpu)) {
if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
ret = -ENXIO; /* No such CPU */
goto out;
}

6
arch/x86/kernel/io_apic.c
View file

@ -214,11 +214,11 @@ static struct irq_cfg *get_one_free_irq_cfg(int cpu)
cfg = kzalloc_node(sizeof(*cfg), GFP_ATOMIC, node);
if (cfg) {
/* FIXME: needs alloc_cpumask_var_node() */
if (!alloc_cpumask_var(&cfg->domain, GFP_ATOMIC)) {
if (!alloc_cpumask_var_node(&cfg->domain, GFP_ATOMIC, node)) {
kfree(cfg);
cfg = NULL;
} else if (!alloc_cpumask_var(&cfg->old_domain, GFP_ATOMIC)) {
} else if (!alloc_cpumask_var_node(&cfg->old_domain,
GFP_ATOMIC, node)) {
free_cpumask_var(cfg->domain);
kfree(cfg);
cfg = NULL;

2
arch/x86/kernel/msr.c
View file

@ -136,7 +136,7 @@ static int msr_open(struct inode *inode, struct file *file)
lock_kernel();
cpu = iminor(file->f_path.dentry->d_inode);
if (cpu >= NR_CPUS || !cpu_online(cpu)) {
if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
ret = -ENXIO; /* No such CPU */
goto out;
}

4
arch/x86/kernel/reboot.c
View file

@ -501,7 +501,7 @@ void native_machine_shutdown(void)
#ifdef CONFIG_X86_32
/* See if there has been given a command line override */
if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) &&
cpu_online(reboot_cpu))
reboot_cpu_id = reboot_cpu;
#endif
@ -511,7 +511,7 @@ void native_machine_shutdown(void)
reboot_cpu_id = smp_processor_id();
/* Make certain I only run on the appropriate processor */
set_cpus_allowed_ptr(current, &cpumask_of_cpu(reboot_cpu_id));
set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id));
/* O.K Now that I'm on the appropriate processor,
* stop all of the others.

33
arch/x86/kernel/setup_percpu.c
View file

@ -153,12 +153,10 @@ void __init setup_per_cpu_areas(void)
align = max_t(unsigned long, PAGE_SIZE, align);
size = roundup(old_size, align);
printk(KERN_INFO
"NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);
printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
size);
pr_info("PERCPU: Allocating %zd bytes of per cpu data\n", size);
for_each_possible_cpu(cpu) {
#ifndef CONFIG_NEED_MULTIPLE_NODES
@ -169,22 +167,15 @@ void __init setup_per_cpu_areas(void)
if (!node_online(node) || !NODE_DATA(node)) {
ptr = __alloc_bootmem(size, align,
__pa(MAX_DMA_ADDRESS));
printk(KERN_INFO
"cpu %d has no node %d or node-local memory\n",
pr_info("cpu %d has no node %d or node-local memory\n",
cpu, node);
if (ptr)
printk(KERN_DEBUG
"per cpu data for cpu%d at %016lx\n",
cpu, __pa(ptr));
}
else {
pr_debug("per cpu data for cpu%d at %016lx\n",
cpu, __pa(ptr));
} else {
ptr = __alloc_bootmem_node(NODE_DATA(node), size, align,
__pa(MAX_DMA_ADDRESS));
if (ptr)
printk(KERN_DEBUG
"per cpu data for cpu%d on node%d "
"at %016lx\n",
cpu, node, __pa(ptr));
pr_debug("per cpu data for cpu%d on node%d at %016lx\n",
cpu, node, __pa(ptr));
}
#endif
per_cpu_offset(cpu) = ptr - __per_cpu_start;
@ -339,25 +330,25 @@ static const cpumask_t cpu_mask_none;
/*
* Returns a pointer to the bitmask of CPUs on Node 'node'.
*/
const cpumask_t *_node_to_cpumask_ptr(int node)
const cpumask_t *cpumask_of_node(int node)
{
if (node_to_cpumask_map == NULL) {
printk(KERN_WARNING
"_node_to_cpumask_ptr(%d): no node_to_cpumask_map!\n",
"cpumask_of_node(%d): no node_to_cpumask_map!\n",
node);
dump_stack();
return (const cpumask_t *)&cpu_online_map;
}
if (node >= nr_node_ids) {
printk(KERN_WARNING
"_node_to_cpumask_ptr(%d): node > nr_node_ids(%d)\n",
"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
node, nr_node_ids);
dump_stack();
return &cpu_mask_none;
}
return &node_to_cpumask_map[node];
}
EXPORT_SYMBOL(_node_to_cpumask_ptr);
EXPORT_SYMBOL(cpumask_of_node);
/*
* Returns a bitmask of CPUs on Node 'node'.

15
arch/x86/kernel/smpboot.c
View file

@ -496,7 +496,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
}
/* maps the cpu to the sched domain representing multi-core */
cpumask_t cpu_coregroup_map(int cpu)
const struct cpumask *cpu_coregroup_mask(int cpu)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
/*
@ -504,9 +504,14 @@ cpumask_t cpu_coregroup_map(int cpu)
* And for power savings, we return cpu_core_map
*/
if (sched_mc_power_savings || sched_smt_power_savings)
return per_cpu(cpu_core_map, cpu);
return &per_cpu(cpu_core_map, cpu);
else
return c->llc_shared_map;
return &c->llc_shared_map;
}
cpumask_t cpu_coregroup_map(int cpu)
{
return *cpu_coregroup_mask(cpu);
}
static void impress_friends(void)
@ -1149,7 +1154,7 @@ static void __init smp_cpu_index_default(void)
for_each_possible_cpu(i) {
c = &cpu_data(i);
/* mark all to hotplug */
c->cpu_index = NR_CPUS;
c->cpu_index = nr_cpu_ids;
}
}
@ -1293,6 +1298,8 @@ __init void prefill_possible_map(void)
else
possible = setup_possible_cpus;
total_cpus = max_t(int, possible, num_processors + disabled_cpus);
if (possible > CONFIG_NR_CPUS) {
printk(KERN_WARNING
"%d Processors exceeds NR_CPUS limit of %d\n",

7
arch/x86/mach-voyager/voyager_smp.c
View file

@ -357,9 +357,8 @@ void __init find_smp_config(void)
printk("VOYAGER SMP: Boot cpu is %d\n", boot_cpu_id);
/* initialize the CPU structures (moved from smp_boot_cpus) */
for (i = 0; i < NR_CPUS; i++) {
for (i = 0; i < nr_cpu_ids; i++)
cpu_irq_affinity[i] = ~0;
}
cpu_online_map = cpumask_of_cpu(boot_cpu_id);
/* The boot CPU must be extended */
@ -1227,7 +1226,7 @@ int setup_profiling_timer(unsigned int multiplier)
* new values until the next timer interrupt in which they do process
* accounting.
*/
for (i = 0; i < NR_CPUS; ++i)
for (i = 0; i < nr_cpu_ids; ++i)
per_cpu(prof_multiplier, i) = multiplier;
return 0;
@ -1257,7 +1256,7 @@ void __init voyager_smp_intr_init(void)
int i;
/* initialize the per cpu irq mask to all disabled */
for (i = 0; i < NR_CPUS; i++)
for (i = 0; i < nr_cpu_ids; i++)
vic_irq_mask[i] = 0xFFFF;
VIC_SET_GATE(VIC_CPI_LEVEL0, vic_cpi_interrupt);

4
block/blk.h
View file

@ -99,8 +99,8 @@ static inline int queue_congestion_off_threshold(struct request_queue *q)
static inline int blk_cpu_to_group(int cpu)
{
#ifdef CONFIG_SCHED_MC
cpumask_t mask = cpu_coregroup_map(cpu);
return first_cpu(mask);
const struct cpumask *mask = cpu_coregroup_mask(cpu);
return cpumask_first(mask);
#elif defined(CONFIG_SCHED_SMT)
return first_cpu(per_cpu(cpu_sibling_map, cpu));
#else

14
drivers/acpi/processor_core.c
View file

@ -826,6 +826,11 @@ static int acpi_processor_add(struct acpi_device *device)
if (!pr)
return -ENOMEM;
if (!alloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) {
kfree(pr);
return -ENOMEM;
}
pr->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
@ -845,10 +850,8 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
pr = acpi_driver_data(device);
if (pr->id >= nr_cpu_ids) {
kfree(pr);
return 0;
}
if (pr->id >= nr_cpu_ids)
goto free;
if (type == ACPI_BUS_REMOVAL_EJECT) {
if (acpi_processor_handle_eject(pr))
@ -873,6 +876,9 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
per_cpu(processors, pr->id) = NULL;
per_cpu(processor_device_array, pr->id) = NULL;
free:
free_cpumask_var(pr->throttling.shared_cpu_map);
kfree(pr);
return 0;

28
drivers/acpi/processor_perflib.c
View file

@ -588,12 +588,15 @@ int acpi_processor_preregister_performance(
int count, count_target;
int retval = 0;
unsigned int i, j;
cpumask_t covered_cpus;
cpumask_var_t covered_cpus;
struct acpi_processor *pr;
struct acpi_psd_package *pdomain;
struct acpi_processor *match_pr;
struct acpi_psd_package *match_pdomain;
if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
return -ENOMEM;
mutex_lock(&performance_mutex);
retval = 0;
@ -617,7 +620,7 @@ int acpi_processor_preregister_performance(
}
pr->performance = percpu_ptr(performance, i);
cpu_set(i, pr->performance->shared_cpu_map);
cpumask_set_cpu(i, pr->performance->shared_cpu_map);
if (acpi_processor_get_psd(pr)) {
retval = -EINVAL;
continue;
@ -650,18 +653,18 @@ int acpi_processor_preregister_performance(
}
}
cpus_clear(covered_cpus);
cpumask_clear(covered_cpus);
for_each_possible_cpu(i) {
pr = per_cpu(processors, i);
if (!pr)
continue;
if (cpu_isset(i, covered_cpus))
if (cpumask_test_cpu(i, covered_cpus))
continue;
pdomain = &(pr->performance->domain_info);
cpu_set(i, pr->performance->shared_cpu_map);
cpu_set(i, covered_cpus);
cpumask_set_cpu(i, pr->performance->shared_cpu_map);
cpumask_set_cpu(i, covered_cpus);
if (pdomain->num_processors <= 1)
continue;
@ -699,8 +702,8 @@ int acpi_processor_preregister_performance(
goto err_ret;
}
cpu_set(j, covered_cpus);
cpu_set(j, pr->performance->shared_cpu_map);
cpumask_set_cpu(j, covered_cpus);
cpumask_set_cpu(j, pr->performance->shared_cpu_map);
count++;
}
@ -718,8 +721,8 @@ int acpi_processor_preregister_performance(
match_pr->performance->shared_type =
pr->performance->shared_type;
match_pr->performance->shared_cpu_map =
pr->performance->shared_cpu_map;
cpumask_copy(match_pr->performance->shared_cpu_map,
pr->performance->shared_cpu_map);
}
}
@ -731,14 +734,15 @@ err_ret:
/* Assume no coordination on any error parsing domain info */
if (retval) {
cpus_clear(pr->performance->shared_cpu_map);
cpu_set(i, pr->performance->shared_cpu_map);
cpumask_clear(pr->performance->shared_cpu_map);
cpumask_set_cpu(i, pr->performance->shared_cpu_map);
pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
}
pr->performance = NULL; /* Will be set for real in register */
}
mutex_unlock(&performance_mutex);
free_cpumask_var(covered_cpus);
return retval;
}
EXPORT_SYMBOL(acpi_processor_preregister_performance);

80
drivers/acpi/processor_throttling.c
View file

@ -61,11 +61,14 @@ static int acpi_processor_update_tsd_coord(void)
int count, count_target;
int retval = 0;
unsigned int i, j;
cpumask_t covered_cpus;
cpumask_var_t covered_cpus;
struct acpi_processor *pr, *match_pr;
struct acpi_tsd_package *pdomain, *match_pdomain;
struct acpi_processor_throttling *pthrottling, *match_pthrottling;
if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
return -ENOMEM;
/*
* Now that we have _TSD data from all CPUs, lets setup T-state
* coordination between all CPUs.
@ -91,19 +94,19 @@ static int acpi_processor_update_tsd_coord(void)
if (retval)
goto err_ret;
cpus_clear(covered_cpus);
cpumask_clear(covered_cpus);
for_each_possible_cpu(i) {
pr = per_cpu(processors, i);
if (!pr)
continue;
if (cpu_isset(i, covered_cpus))
if (cpumask_test_cpu(i, covered_cpus))
continue;
pthrottling = &pr->throttling;
pdomain = &(pthrottling->domain_info);
cpu_set(i, pthrottling->shared_cpu_map);
cpu_set(i, covered_cpus);
cpumask_set_cpu(i, pthrottling->shared_cpu_map);
cpumask_set_cpu(i, covered_cpus);
/*
* If the number of processor in the TSD domain is 1, it is
* unnecessary to parse the coordination for this CPU.
@ -144,8 +147,8 @@ static int acpi_processor_update_tsd_coord(void)
goto err_ret;
}
cpu_set(j, covered_cpus);
cpu_set(j, pthrottling->shared_cpu_map);
cpumask_set_cpu(j, covered_cpus);
cpumask_set_cpu(j, pthrottling->shared_cpu_map);
count++;
}
for_each_possible_cpu(j) {
@ -165,12 +168,14 @@ static int acpi_processor_update_tsd_coord(void)
* If some CPUS have the same domain, they
* will have the same shared_cpu_map.
*/
match_pthrottling->shared_cpu_map =
pthrottling->shared_cpu_map;
cpumask_copy(match_pthrottling->shared_cpu_map,
pthrottling->shared_cpu_map);
}
}
err_ret:
free_cpumask_var(covered_cpus);
for_each_possible_cpu(i) {
pr = per_cpu(processors, i);
if (!pr)
@ -182,8 +187,8 @@ err_ret:
*/
if (retval) {
pthrottling = &(pr->throttling);
cpus_clear(pthrottling->shared_cpu_map);
cpu_set(i, pthrottling->shared_cpu_map);
cpumask_clear(pthrottling->shared_cpu_map);
cpumask_set_cpu(i, pthrottling->shared_cpu_map);
pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
}
}
@ -567,7 +572,7 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
pthrottling = &pr->throttling;
pthrottling->tsd_valid_flag = 1;
pthrottling->shared_type = pdomain->coord_type;
cpu_set(pr->id, pthrottling->shared_cpu_map);
cpumask_set_cpu(pr->id, pthrottling->shared_cpu_map);
/*
* If the coordination type is not defined in ACPI spec,
* the tsd_valid_flag will be clear and coordination type
@ -826,7 +831,7 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
static int acpi_processor_get_throttling(struct acpi_processor *pr)
{
cpumask_t saved_mask;
cpumask_var_t saved_mask;
int ret;
if (!pr)
@ -834,14 +839,20 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
if (!pr->flags.throttling)
return -ENODEV;
if (!alloc_cpumask_var(&saved_mask, GFP_KERNEL))
return -ENOMEM;
/*
* Migrate task to the cpu pointed by pr.
*/
saved_mask = current->cpus_allowed;
set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
cpumask_copy(saved_mask, &current->cpus_allowed);
/* FIXME: use work_on_cpu() */
set_cpus_allowed_ptr(current, cpumask_of(pr->id));
ret = pr->throttling.acpi_processor_get_throttling(pr);
/* restore the previous state */
set_cpus_allowed_ptr(current, &saved_mask);
set_cpus_allowed_ptr(current, saved_mask);
free_cpumask_var(saved_mask);
return ret;
}
@ -986,13 +997,13 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
{
cpumask_t saved_mask;
cpumask_var_t saved_mask;
int ret = 0;
unsigned int i;
struct acpi_processor *match_pr;
struct acpi_processor_throttling *p_throttling;
struct throttling_tstate t_state;
cpumask_t online_throttling_cpus;
cpumask_var_t online_throttling_cpus;
if (!pr)
return -EINVAL;
@ -1003,17 +1014,25 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
if ((state < 0) || (state > (pr->throttling.state_count - 1)))
return -EINVAL;
saved_mask = current->cpus_allowed;
if (!alloc_cpumask_var(&saved_mask, GFP_KERNEL))
return -ENOMEM;
if (!alloc_cpumask_var(&online_throttling_cpus, GFP_KERNEL)) {
free_cpumask_var(saved_mask);
return -ENOMEM;
}
cpumask_copy(saved_mask, &current->cpus_allowed);
t_state.target_state = state;
p_throttling = &(pr->throttling);
cpus_and(online_throttling_cpus, cpu_online_map,
p_throttling->shared_cpu_map);
cpumask_and(online_throttling_cpus, cpu_online_mask,
p_throttling->shared_cpu_map);
/*
* The throttling notifier will be called for every
* affected cpu in order to get one proper T-state.
* The notifier event is THROTTLING_PRECHANGE.
*/
for_each_cpu_mask_nr(i, online_throttling_cpus) {
for_each_cpu(i, online_throttling_cpus) {
t_state.cpu = i;
acpi_processor_throttling_notifier(THROTTLING_PRECHANGE,
&t_state);
@ -1025,7 +1044,8 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
* it can be called only for the cpu pointed by pr.
*/
if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
/* FIXME: use work_on_cpu() */
set_cpus_allowed_ptr(current, cpumask_of(pr->id));
ret = p_throttling->acpi_processor_set_throttling(pr,
t_state.target_state);
} else {
@ -1034,7 +1054,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
* it is necessary to set T-state for every affected
* cpus.
*/
for_each_cpu_mask_nr(i, online_throttling_cpus) {
for_each_cpu(i, online_throttling_cpus) {
match_pr = per_cpu(processors, i);
/*
* If the pointer is invalid, we will report the
@ -1056,7 +1076,8 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
continue;
}
t_state.cpu = i;
set_cpus_allowed_ptr(current, &cpumask_of_cpu(i));
/* FIXME: use work_on_cpu() */
set_cpus_allowed_ptr(current, cpumask_of(i));
ret = match_pr->throttling.
acpi_processor_set_throttling(
match_pr, t_state.target_state);
@ -1068,13 +1089,16 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
* affected cpu to update the T-states.
* The notifier event is THROTTLING_POSTCHANGE
*/
for_each_cpu_mask_nr(i, online_throttling_cpus) {
for_each_cpu(i, online_throttling_cpus) {
t_state.cpu = i;
acpi_processor_throttling_notifier(THROTTLING_POSTCHANGE,
&t_state);
}
/* restore the previous state */
set_cpus_allowed_ptr(current, &saved_mask);
/* FIXME: use work_on_cpu() */
set_cpus_allowed_ptr(current, saved_mask);
free_cpumask_var(online_throttling_cpus);
free_cpumask_var(saved_mask);
return ret;
}
@ -1120,7 +1144,7 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
if (acpi_processor_get_tsd(pr)) {
pthrottling = &pr->throttling;
pthrottling->tsd_valid_flag = 0;
cpu_set(pr->id, pthrottling->shared_cpu_map);
cpumask_set_cpu(pr->id, pthrottling->shared_cpu_map);
pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
}

44
drivers/base/cpu.c
View file

@ -128,10 +128,54 @@ print_cpus_func(online);
print_cpus_func(possible);
print_cpus_func(present);
/*
* Print values for NR_CPUS and offlined cpus
*/
static ssize_t print_cpus_kernel_max(struct sysdev_class *class, char *buf)
{
int n = snprintf(buf, PAGE_SIZE-2, "%d\n", NR_CPUS - 1);
return n;
}
static SYSDEV_CLASS_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
/* arch-optional setting to enable display of offline cpus >= nr_cpu_ids */
unsigned int total_cpus;
static ssize_t print_cpus_offline(struct sysdev_class *class, char *buf)
{
int n = 0, len = PAGE_SIZE-2;
cpumask_var_t offline;
/* display offline cpus < nr_cpu_ids */
if (!alloc_cpumask_var(&offline, GFP_KERNEL))
return -ENOMEM;
cpumask_complement(offline, cpu_online_mask);
n = cpulist_scnprintf(buf, len, offline);
free_cpumask_var(offline);
/* display offline cpus >= nr_cpu_ids */
if (total_cpus && nr_cpu_ids < total_cpus) {
if (n && n < len)
buf[n++] = ',';
if (nr_cpu_ids == total_cpus-1)
n += snprintf(&buf[n], len - n, "%d", nr_cpu_ids);
else
n += snprintf(&buf[n], len - n, "%d-%d",
nr_cpu_ids, total_cpus-1);
}
n += snprintf(&buf[n], len - n, "\n");
return n;
}
static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL);
static struct sysdev_class_attribute *cpu_state_attr[] = {
&attr_online_map,
&attr_possible_map,
&attr_present_map,
&attr_kernel_max,
&attr_offline,
};
static int cpu_states_init(void)

17
drivers/infiniband/hw/ehca/ehca_irq.c
View file

@ -659,12 +659,12 @@ static inline int find_next_online_cpu(struct ehca_comp_pool *pool)
WARN_ON_ONCE(!in_interrupt());
if (ehca_debug_level >= 3)
ehca_dmp(&cpu_online_map, sizeof(cpumask_t), "");
ehca_dmp(cpu_online_mask, cpumask_size(), "");
spin_lock_irqsave(&pool->last_cpu_lock, flags);
cpu = next_cpu_nr(pool->last_cpu, cpu_online_map);
cpu = cpumask_next(pool->last_cpu, cpu_online_mask);
if (cpu >= nr_cpu_ids)
cpu = first_cpu(cpu_online_map);
cpu = cpumask_first(cpu_online_mask);
pool->last_cpu = cpu;
spin_unlock_irqrestore(&pool->last_cpu_lock, flags);
@ -855,7 +855,7 @@ static int __cpuinit comp_pool_callback(struct notifier_block *nfb,
case CPU_UP_CANCELED_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu);
cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
kthread_bind(cct->task, any_online_cpu(cpu_online_map));
kthread_bind(cct->task, cpumask_any(cpu_online_mask));
destroy_comp_task(pool, cpu);
break;
case CPU_ONLINE:
@ -902,7 +902,7 @@ int ehca_create_comp_pool(void)
return -ENOMEM;
spin_lock_init(&pool->last_cpu_lock);
pool->last_cpu = any_online_cpu(cpu_online_map);
pool->last_cpu = cpumask_any(cpu_online_mask);
pool->cpu_comp_tasks = alloc_percpu(struct ehca_cpu_comp_task);
if (pool->cpu_comp_tasks == NULL) {
@ -934,10 +934,9 @@ void ehca_destroy_comp_pool(void)
unregister_hotcpu_notifier(&comp_pool_callback_nb);
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
destroy_comp_task(pool, i);
}
for_each_online_cpu(i)
destroy_comp_task(pool, i);
free_percpu(pool->cpu_comp_tasks);
kfree(pool);
}

8
drivers/infiniband/hw/ipath/ipath_file_ops.c
View file

@ -1679,7 +1679,7 @@ static int find_best_unit(struct file *fp,
* InfiniPath chip to that processor (we assume reasonable connectivity,
* for now). This code assumes that if affinity has been set
* before this point, that at most one cpu is set; for now this
* is reasonable. I check for both cpus_empty() and cpus_full(),
* is reasonable. I check for both cpumask_empty() and cpumask_full(),
* in case some kernel variant sets none of the bits when no
* affinity is set. 2.6.11 and 12 kernels have all present
* cpus set. Some day we'll have to fix it up further to handle
@ -1688,11 +1688,11 @@ static int find_best_unit(struct file *fp,
* information. There may be some issues with dual core numbering
* as well. This needs more work prior to release.
*/
if (!cpus_empty(current->cpus_allowed) &&
!cpus_full(current->cpus_allowed)) {
if (!cpumask_empty(&current->cpus_allowed) &&
!cpumask_full(&current->cpus_allowed)) {
int ncpus = num_online_cpus(), curcpu = -1, nset = 0;
for (i = 0; i < ncpus; i++)
if (cpu_isset(i, current->cpus_allowed)) {
if (cpumask_test_cpu(i, &current->cpus_allowed)) {
ipath_cdbg(PROC, "%s[%u] affinity set for "
"cpu %d/%d\n", current->comm,
current->pid, i, ncpus);

2
drivers/pnp/pnpbios/bioscalls.c
View file

@ -481,7 +481,7 @@ void pnpbios_calls_init(union pnp_bios_install_struct *header)
set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
for (i = 0; i < NR_CPUS; i++) {
for_each_possible_cpu(i) {
struct desc_struct *gdt = get_cpu_gdt_table(i);
if (!gdt)
continue;

3
fs/seq_file.c
View file

@ -468,7 +468,8 @@ int seq_dentry(struct seq_file *m, struct dentry *dentry, char *esc)
return -1;
}
int seq_bitmap(struct seq_file *m, unsigned long *bits, unsigned int nr_bits)
int seq_bitmap(struct seq_file *m, const unsigned long *bits,
unsigned int nr_bits)
{
if (m->count < m->size) {
int len = bitmap_scnprintf(m->buf + m->count,

4
include/acpi/processor.h
View file

@ -127,7 +127,7 @@ struct acpi_processor_performance {
unsigned int state_count;
struct acpi_processor_px *states;
struct acpi_psd_package domain_info;
cpumask_t shared_cpu_map;
cpumask_var_t shared_cpu_map;
unsigned int shared_type;
};
@ -172,7 +172,7 @@ struct acpi_processor_throttling {
unsigned int state_count;
struct acpi_processor_tx_tss *states_tss;
struct acpi_tsd_package domain_info;
cpumask_t shared_cpu_map;
cpumask_var_t shared_cpu_map;
int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
int state);

13
include/asm-frv/bitops.h
View file

@ -339,6 +339,19 @@ int __ffs(unsigned long x)
return 31 - bit;
}
/**
* __fls - find last (most-significant) set bit in a long word
* @word: the word to search
*
* Undefined if no set bit exists, so code should check against 0 first.
*/
static inline unsigned long __fls(unsigned long word)
{
unsigned long bit;
asm("scan %1,gr0,%0" : "=r"(bit) : "r"(word));
return bit;
}
/*
* special slimline version of fls() for calculating ilog2_u32()
* - note: no protection against n == 0

1
include/asm-m32r/bitops.h
View file

@ -251,6 +251,7 @@ static __inline__ int test_and_change_bit(int nr, volatile void * addr)
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#ifdef __KERNEL__

5
include/asm-m68k/bitops.h
View file

@ -315,6 +315,11 @@ static inline int fls(int x)
return 32 - cnt;
}
static inline int __fls(int x)
{
return fls(x) - 1;
}
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/hweight.h>

11
include/asm-mn10300/bitops.h
View file

@ -195,6 +195,17 @@ int fls(int x)
return (x != 0) ? __ilog2_u32(x) + 1 : 0;
}
/**
* __fls - find last (most-significant) set bit in a long word
* @word: the word to search
*
* Undefined if no set bit exists, so code should check against 0 first.
*/
static inline unsigned long __fls(unsigned long word)
{
return __ilog2_u32(word);
}
/**
* ffs - find first bit set
* @x: the word to search

11
include/asm-xtensa/bitops.h
View file

@ -82,6 +82,16 @@ static inline int fls (unsigned int x)
return 32 - __cntlz(x);
}
/**
* __fls - find last (most-significant) set bit in a long word
* @word: the word to search
*
* Undefined if no set bit exists, so code should check against 0 first.
*/
static inline unsigned long __fls(unsigned long word)
{
return 31 - __cntlz(word);
}
#else
/* Use the generic implementation if we don't have the nsa/nsau instructions. */
@ -90,6 +100,7 @@ static inline int fls (unsigned int x)
# include <asm-generic/bitops/__ffs.h>
# include <asm-generic/bitops/ffz.h>
# include <asm-generic/bitops/fls.h>
# include <asm-generic/bitops/__fls.h>
#endif

35
include/linux/bitmap.h
View file

@ -137,9 +137,12 @@ extern void bitmap_copy_le(void *dst, const unsigned long *src, int nbits);
(1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
)
#define small_const_nbits(nbits) \
(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
static inline void bitmap_zero(unsigned long *dst, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = 0UL;
else {
int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
@ -150,7 +153,7 @@ static inline void bitmap_zero(unsigned long *dst, int nbits)
static inline void bitmap_fill(unsigned long *dst, int nbits)
{
size_t nlongs = BITS_TO_LONGS(nbits);
if (nlongs > 1) {
if (!small_const_nbits(nbits)) {
int len = (nlongs - 1) * sizeof(unsigned long);
memset(dst, 0xff, len);
}
@ -160,7 +163,7 @@ static inline void bitmap_fill(unsigned long *dst, int nbits)
static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src;
else {
int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
@ -171,7 +174,7 @@ static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
static inline void bitmap_and(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src1 & *src2;
else
__bitmap_and(dst, src1, src2, nbits);
@ -180,7 +183,7 @@ static inline void bitmap_and(unsigned long *dst, const unsigned long *src1,
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src1 | *src2;
else
__bitmap_or(dst, src1, src2, nbits);
@ -189,7 +192,7 @@ static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
static inline void bitmap_xor(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src1 ^ *src2;
else
__bitmap_xor(dst, src1, src2, nbits);
@ -198,7 +201,7 @@ static inline void bitmap_xor(unsigned long *dst, const unsigned long *src1,
static inline void bitmap_andnot(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src1 & ~(*src2);
else
__bitmap_andnot(dst, src1, src2, nbits);
@ -207,7 +210,7 @@ static inline void bitmap_andnot(unsigned long *dst, const unsigned long *src1,
static inline void bitmap_complement(unsigned long *dst, const unsigned long *src,
int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = ~(*src) & BITMAP_LAST_WORD_MASK(nbits);
else
__bitmap_complement(dst, src, nbits);
@ -216,7 +219,7 @@ static inline void bitmap_complement(unsigned long *dst, const unsigned long *sr
static inline int bitmap_equal(const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return ! ((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
else
return __bitmap_equal(src1, src2, nbits);
@ -225,7 +228,7 @@ static inline int bitmap_equal(const unsigned long *src1,
static inline int bitmap_intersects(const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return ((*src1 & *src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0;
else
return __bitmap_intersects(src1, src2, nbits);
@ -234,7 +237,7 @@ static inline int bitmap_intersects(const unsigned long *src1,
static inline int bitmap_subset(const unsigned long *src1,
const unsigned long *src2, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return ! ((*src1 & ~(*src2)) & BITMAP_LAST_WORD_MASK(nbits));
else
return __bitmap_subset(src1, src2, nbits);
@ -242,7 +245,7 @@ static inline int bitmap_subset(const unsigned long *src1,
static inline int bitmap_empty(const unsigned long *src, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
else
return __bitmap_empty(src, nbits);
@ -250,7 +253,7 @@ static inline int bitmap_empty(const unsigned long *src, int nbits)
static inline int bitmap_full(const unsigned long *src, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
else
return __bitmap_full(src, nbits);
@ -258,7 +261,7 @@ static inline int bitmap_full(const unsigned long *src, int nbits)
static inline int bitmap_weight(const unsigned long *src, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
return __bitmap_weight(src, nbits);
}
@ -266,7 +269,7 @@ static inline int bitmap_weight(const unsigned long *src, int nbits)
static inline void bitmap_shift_right(unsigned long *dst,
const unsigned long *src, int n, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = *src >> n;
else
__bitmap_shift_right(dst, src, n, nbits);
@ -275,7 +278,7 @@ static inline void bitmap_shift_right(unsigned long *dst,
static inline void bitmap_shift_left(unsigned long *dst,
const unsigned long *src, int n, int nbits)
{
if (nbits <= BITS_PER_LONG)
if (small_const_nbits(nbits))
*dst = (*src << n) & BITMAP_LAST_WORD_MASK(nbits);
else
__bitmap_shift_left(dst, src, n, nbits);

13
include/linux/bitops.h
View file

@ -134,9 +134,20 @@ extern unsigned long find_first_bit(const unsigned long *addr,
*/
extern unsigned long find_first_zero_bit(const unsigned long *addr,
unsigned long size);
#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */
#ifdef CONFIG_GENERIC_FIND_LAST_BIT
/**
* find_last_bit - find the last set bit in a memory region
* @addr: The address to start the search at
* @size: The maximum size to search
*
* Returns the bit number of the first set bit, or size.
*/
extern unsigned long find_last_bit(const unsigned long *addr,
unsigned long size);
#endif /* CONFIG_GENERIC_FIND_LAST_BIT */
#ifdef CONFIG_GENERIC_FIND_NEXT_BIT
/**

221
include/linux/cpumask.h
View file

@ -144,6 +144,7 @@
typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
extern cpumask_t _unused_cpumask_arg_;
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
{
@ -267,6 +268,26 @@ static inline void __cpus_shift_left(cpumask_t *dstp,
{
bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
}
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
/**
* to_cpumask - convert an NR_CPUS bitmap to a struct cpumask *
* @bitmap: the bitmap
*
* There are a few places where cpumask_var_t isn't appropriate and
* static cpumasks must be used (eg. very early boot), yet we don't
* expose the definition of 'struct cpumask'.
*
* This does the conversion, and can be used as a constant initializer.
*/
#define to_cpumask(bitmap) \
((struct cpumask *)(1 ? (bitmap) \
: (void *)sizeof(__check_is_bitmap(bitmap))))
static inline int __check_is_bitmap(const unsigned long *bitmap)
{
return 1;
}
/*
* Special-case data structure for "single bit set only" constant CPU masks.
@ -278,13 +299,14 @@ static inline void __cpus_shift_left(cpumask_t *dstp,
extern const unsigned long
cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
static inline const cpumask_t *get_cpu_mask(unsigned int cpu)
static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
{
const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
p -= cpu / BITS_PER_LONG;
return (const cpumask_t *)p;
return to_cpumask(p);
}
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
/*
* In cases where we take the address of the cpumask immediately,
* gcc optimizes it out (it's a constant) and there's no huge stack
@ -370,19 +392,22 @@ static inline void __cpus_fold(cpumask_t *dstp, const cpumask_t *origp,
{
bitmap_fold(dstp->bits, origp->bits, sz, nbits);
}
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
#if NR_CPUS == 1
#define nr_cpu_ids 1
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
#define first_cpu(src) ({ (void)(src); 0; })
#define next_cpu(n, src) ({ (void)(src); 1; })
#define any_online_cpu(mask) 0
#define for_each_cpu_mask(cpu, mask) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
#else /* NR_CPUS > 1 */
extern int nr_cpu_ids;
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
int __first_cpu(const cpumask_t *srcp);
int __next_cpu(int n, const cpumask_t *srcp);
int __any_online_cpu(const cpumask_t *mask);
@ -394,8 +419,10 @@ int __any_online_cpu(const cpumask_t *mask);
for ((cpu) = -1; \
(cpu) = next_cpu((cpu), (mask)), \
(cpu) < NR_CPUS; )
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
#endif
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
#if NR_CPUS <= 64
#define next_cpu_nr(n, src) next_cpu(n, src)
@ -413,77 +440,67 @@ int __next_cpu_nr(int n, const cpumask_t *srcp);
(cpu) < nr_cpu_ids; )
#endif /* NR_CPUS > 64 */
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
/*
* The following particular system cpumasks and operations manage
* possible, present, active and online cpus. Each of them is a fixed size
* bitmap of size NR_CPUS.
* possible, present, active and online cpus.
*
* #ifdef CONFIG_HOTPLUG_CPU
* cpu_possible_map - has bit 'cpu' set iff cpu is populatable
* cpu_present_map - has bit 'cpu' set iff cpu is populated
* cpu_online_map - has bit 'cpu' set iff cpu available to scheduler
* cpu_active_map - has bit 'cpu' set iff cpu available to migration
* #else
* cpu_possible_map - has bit 'cpu' set iff cpu is populated
* cpu_present_map - copy of cpu_possible_map
* cpu_online_map - has bit 'cpu' set iff cpu available to scheduler
* #endif
* cpu_possible_mask- has bit 'cpu' set iff cpu is populatable
* cpu_present_mask - has bit 'cpu' set iff cpu is populated
* cpu_online_mask - has bit 'cpu' set iff cpu available to scheduler
* cpu_active_mask - has bit 'cpu' set iff cpu available to migration
*
* In either case, NR_CPUS is fixed at compile time, as the static
* size of these bitmaps. The cpu_possible_map is fixed at boot
* time, as the set of CPU id's that it is possible might ever
* be plugged in at anytime during the life of that system boot.
* The cpu_present_map is dynamic(*), representing which CPUs
* are currently plugged in. And cpu_online_map is the dynamic
* subset of cpu_present_map, indicating those CPUs available
* for scheduling.
* If !CONFIG_HOTPLUG_CPU, present == possible, and active == online.
*
* If HOTPLUG is enabled, then cpu_possible_map is forced to have
* The cpu_possible_mask is fixed at boot time, as the set of CPU id's
* that it is possible might ever be plugged in at anytime during the
* life of that system boot. The cpu_present_mask is dynamic(*),
* representing which CPUs are currently plugged in. And
* cpu_online_mask is the dynamic subset of cpu_present_mask,
* indicating those CPUs available for scheduling.
*
* If HOTPLUG is enabled, then cpu_possible_mask is forced to have
* all NR_CPUS bits set, otherwise it is just the set of CPUs that
* ACPI reports present at boot.
*
* If HOTPLUG is enabled, then cpu_present_map varies dynamically,
* If HOTPLUG is enabled, then cpu_present_mask varies dynamically,
* depending on what ACPI reports as currently plugged in, otherwise
* cpu_present_map is just a copy of cpu_possible_map.
* cpu_present_mask is just a copy of cpu_possible_mask.
*
* (*) Well, cpu_present_map is dynamic in the hotplug case. If not
* hotplug, it's a copy of cpu_possible_map, hence fixed at boot.
* (*) Well, cpu_present_mask is dynamic in the hotplug case. If not
* hotplug, it's a copy of cpu_possible_mask, hence fixed at boot.
*
* Subtleties:
* 1) UP arch's (NR_CPUS == 1, CONFIG_SMP not defined) hardcode
* assumption that their single CPU is online. The UP
* cpu_{online,possible,present}_maps are placebos. Changing them
* cpu_{online,possible,present}_masks are placebos. Changing them
* will have no useful affect on the following num_*_cpus()
* and cpu_*() macros in the UP case. This ugliness is a UP
* optimization - don't waste any instructions or memory references
* asking if you're online or how many CPUs there are if there is
* only one CPU.
* 2) Most SMP arch's #define some of these maps to be some
* other map specific to that arch. Therefore, the following
* must be #define macros, not inlines. To see why, examine
* the assembly code produced by the following. Note that
* set1() writes phys_x_map, but set2() writes x_map:
* int x_map, phys_x_map;
* #define set1(a) x_map = a
* inline void set2(int a) { x_map = a; }
* #define x_map phys_x_map
* main(){ set1(3); set2(5); }
*/
extern cpumask_t cpu_possible_map;
extern cpumask_t cpu_online_map;
extern cpumask_t cpu_present_map;
extern cpumask_t cpu_active_map;
extern const struct cpumask *const cpu_possible_mask;
extern const struct cpumask *const cpu_online_mask;
extern const struct cpumask *const cpu_present_mask;
extern const struct cpumask *const cpu_active_mask;
/* These strip const, as traditionally they weren't const. */
#define cpu_possible_map (*(cpumask_t *)cpu_possible_mask)
#define cpu_online_map (*(cpumask_t *)cpu_online_mask)
#define cpu_present_map (*(cpumask_t *)cpu_present_mask)
#define cpu_active_map (*(cpumask_t *)cpu_active_mask)
#if NR_CPUS > 1
#define num_online_cpus() cpus_weight_nr(cpu_online_map)
#define num_possible_cpus() cpus_weight_nr(cpu_possible_map)
#define num_present_cpus() cpus_weight_nr(cpu_present_map)
#define cpu_online(cpu) cpu_isset((cpu), cpu_online_map)
#define cpu_possible(cpu) cpu_isset((cpu), cpu_possible_map)
#define cpu_present(cpu) cpu_isset((cpu), cpu_present_map)
#define cpu_active(cpu) cpu_isset((cpu), cpu_active_map)
#define num_online_cpus() cpumask_weight(cpu_online_mask)
#define num_possible_cpus() cpumask_weight(cpu_possible_mask)
#define num_present_cpus() cpumask_weight(cpu_present_mask)
#define cpu_online(cpu) cpumask_test_cpu((cpu), cpu_online_mask)
#define cpu_possible(cpu) cpumask_test_cpu((cpu), cpu_possible_mask)
#define cpu_present(cpu) cpumask_test_cpu((cpu), cpu_present_mask)
#define cpu_active(cpu) cpumask_test_cpu((cpu), cpu_active_mask)
#else
#define num_online_cpus() 1
#define num_possible_cpus() 1
@ -496,10 +513,6 @@ extern cpumask_t cpu_active_map;
#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
#define for_each_possible_cpu(cpu) for_each_cpu_mask_nr((cpu), cpu_possible_map)
#define for_each_online_cpu(cpu) for_each_cpu_mask_nr((cpu), cpu_online_map)
#define for_each_present_cpu(cpu) for_each_cpu_mask_nr((cpu), cpu_present_map)
/* These are the new versions of the cpumask operators: passed by pointer.
* The older versions will be implemented in terms of these, then deleted. */
#define cpumask_bits(maskp) ((maskp)->bits)
@ -687,7 +700,7 @@ static inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp)
* No static inline type checking - see Subtlety (1) above.
*/
#define cpumask_test_cpu(cpu, cpumask) \
test_bit(cpumask_check(cpu), (cpumask)->bits)
test_bit(cpumask_check(cpu), cpumask_bits((cpumask)))
/**
* cpumask_test_and_set_cpu - atomically test and set a cpu in a cpumask
@ -930,7 +943,7 @@ static inline void cpumask_copy(struct cpumask *dstp,
static inline int cpumask_scnprintf(char *buf, int len,
const struct cpumask *srcp)
{
return bitmap_scnprintf(buf, len, srcp->bits, nr_cpumask_bits);
return bitmap_scnprintf(buf, len, cpumask_bits(srcp), nr_cpumask_bits);
}
/**
@ -944,7 +957,7 @@ static inline int cpumask_scnprintf(char *buf, int len,
static inline int cpumask_parse_user(const char __user *buf, int len,
struct cpumask *dstp)
{
return bitmap_parse_user(buf, len, dstp->bits, nr_cpumask_bits);
return bitmap_parse_user(buf, len, cpumask_bits(dstp), nr_cpumask_bits);
}
/**
@ -959,7 +972,8 @@ static inline int cpumask_parse_user(const char __user *buf, int len,
static inline int cpulist_scnprintf(char *buf, int len,
const struct cpumask *srcp)
{
return bitmap_scnlistprintf(buf, len, srcp->bits, nr_cpumask_bits);
return bitmap_scnlistprintf(buf, len, cpumask_bits(srcp),
nr_cpumask_bits);
}
/**
@ -972,26 +986,7 @@ static inline int cpulist_scnprintf(char *buf, int len,
*/
static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
{
return bitmap_parselist(buf, dstp->bits, nr_cpumask_bits);
}
/**
* to_cpumask - convert an NR_CPUS bitmap to a struct cpumask *
* @bitmap: the bitmap
*
* There are a few places where cpumask_var_t isn't appropriate and
* static cpumasks must be used (eg. very early boot), yet we don't
* expose the definition of 'struct cpumask'.
*
* This does the conversion, and can be used as a constant initializer.
*/
#define to_cpumask(bitmap) \
((struct cpumask *)(1 ? (bitmap) \
: (void *)sizeof(__check_is_bitmap(bitmap))))
static inline int __check_is_bitmap(const unsigned long *bitmap)
{
return 1;
return bitmap_parselist(buf, cpumask_bits(dstp), nr_cpumask_bits);
}
/**
@ -1025,6 +1020,7 @@ static inline size_t cpumask_size(void)
#ifdef CONFIG_CPUMASK_OFFSTACK
typedef struct cpumask *cpumask_var_t;
bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node);
bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags);
void alloc_bootmem_cpumask_var(cpumask_var_t *mask);
void free_cpumask_var(cpumask_var_t mask);
@ -1038,6 +1034,12 @@ static inline bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
return true;
}
static inline bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags,
int node)
{
return true;
}
static inline void alloc_bootmem_cpumask_var(cpumask_var_t *mask)
{
}
@ -1051,12 +1053,6 @@ static inline void free_bootmem_cpumask_var(cpumask_var_t mask)
}
#endif /* CONFIG_CPUMASK_OFFSTACK */
/* The pointer versions of the maps, these will become the primary versions. */
#define cpu_possible_mask ((const struct cpumask *)&cpu_possible_map)
#define cpu_online_mask ((const struct cpumask *)&cpu_online_map)
#define cpu_present_mask ((const struct cpumask *)&cpu_present_map)
#define cpu_active_mask ((const struct cpumask *)&cpu_active_map)
/* It's common to want to use cpu_all_mask in struct member initializers,
* so it has to refer to an address rather than a pointer. */
extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS);
@ -1065,51 +1061,16 @@ extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS);
/* First bits of cpu_bit_bitmap are in fact unset. */
#define cpu_none_mask to_cpumask(cpu_bit_bitmap[0])
#define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask)
#define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask)
#define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask)
/* Wrappers for arch boot code to manipulate normally-constant masks */
static inline void set_cpu_possible(unsigned int cpu, bool possible)
{
if (possible)
cpumask_set_cpu(cpu, &cpu_possible_map);
else
cpumask_clear_cpu(cpu, &cpu_possible_map);
}
static inline void set_cpu_present(unsigned int cpu, bool present)
{
if (present)
cpumask_set_cpu(cpu, &cpu_present_map);
else
cpumask_clear_cpu(cpu, &cpu_present_map);
}
static inline void set_cpu_online(unsigned int cpu, bool online)
{
if (online)
cpumask_set_cpu(cpu, &cpu_online_map);
else
cpumask_clear_cpu(cpu, &cpu_online_map);
}
static inline void set_cpu_active(unsigned int cpu, bool active)
{
if (active)
cpumask_set_cpu(cpu, &cpu_active_map);
else
cpumask_clear_cpu(cpu, &cpu_active_map);
}
static inline void init_cpu_present(const struct cpumask *src)
{
cpumask_copy(&cpu_present_map, src);
}
static inline void init_cpu_possible(const struct cpumask *src)
{
cpumask_copy(&cpu_possible_map, src);
}
static inline void init_cpu_online(const struct cpumask *src)
{
cpumask_copy(&cpu_online_map, src);
}
void set_cpu_possible(unsigned int cpu, bool possible);
void set_cpu_present(unsigned int cpu, bool present);
void set_cpu_online(unsigned int cpu, bool online);
void set_cpu_active(unsigned int cpu, bool active);
void init_cpu_present(const struct cpumask *src);
void init_cpu_possible(const struct cpumask *src);
void init_cpu_online(const struct cpumask *src);
#endif /* __LINUX_CPUMASK_H */

2
include/linux/interrupt.h
View file

@ -109,7 +109,7 @@ extern void enable_irq(unsigned int irq);
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
extern cpumask_t irq_default_affinity;
extern cpumask_var_t irq_default_affinity;
extern int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask);
extern int irq_can_set_affinity(unsigned int irq);

4
include/linux/rcuclassic.h
View file

@ -59,8 +59,8 @@ struct rcu_ctrlblk {
int signaled;
spinlock_t lock ____cacheline_internodealigned_in_smp;
cpumask_t cpumask; /* CPUs that need to switch in order */
/* for current batch to proceed. */
DECLARE_BITMAP(cpumask, NR_CPUS); /* CPUs that need to switch for */
/* current batch to proceed. */
} ____cacheline_internodealigned_in_smp;
/* Is batch a before batch b ? */

7
include/linux/seq_file.h
View file

@ -50,10 +50,11 @@ int seq_path(struct seq_file *, struct path *, char *);
int seq_dentry(struct seq_file *, struct dentry *, char *);
int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
char *esc);
int seq_bitmap(struct seq_file *m, unsigned long *bits, unsigned int nr_bits);
static inline int seq_cpumask(struct seq_file *m, cpumask_t *mask)
int seq_bitmap(struct seq_file *m, const unsigned long *bits,
unsigned int nr_bits);
static inline int seq_cpumask(struct seq_file *m, const struct cpumask *mask)
{
return seq_bitmap(m, mask->bits, NR_CPUS);
return seq_bitmap(m, mask->bits, nr_cpu_ids);
}
static inline int seq_nodemask(struct seq_file *m, nodemask_t *mask)

18
include/linux/smp.h
View file

@ -21,6 +21,9 @@ struct call_single_data {
u16 priv;
};
/* total number of cpus in this system (may exceed NR_CPUS) */
extern unsigned int total_cpus;
#ifdef CONFIG_SMP
#include <linux/preempt.h>
@ -64,15 +67,16 @@ extern void smp_cpus_done(unsigned int max_cpus);
* Call a function on all other processors
*/
int smp_call_function(void(*func)(void *info), void *info, int wait);
/* Deprecated: use smp_call_function_many() which uses a cpumask ptr. */
int smp_call_function_mask(cpumask_t mask, void(*func)(void *info), void *info,
int wait);
void smp_call_function_many(const struct cpumask *mask,
void (*func)(void *info), void *info, bool wait);
static inline void smp_call_function_many(const struct cpumask *mask,
void (*func)(void *info), void *info,
int wait)
/* Deprecated: Use smp_call_function_many which takes a pointer to the mask. */
static inline int
smp_call_function_mask(cpumask_t mask, void(*func)(void *info), void *info,
int wait)
{
smp_call_function_mask(*mask, func, info, wait);
smp_call_function_many(&mask, func, info, wait);
return 0;
}
int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,

6
include/linux/stop_machine.h
View file

@ -23,7 +23,7 @@
*
* This can be thought of as a very heavy write lock, equivalent to
* grabbing every spinlock in the kernel. */
int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus);
int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
/**
* __stop_machine: freeze the machine on all CPUs and run this function
@ -34,11 +34,11 @@ int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus);
* Description: This is a special version of the above, which assumes cpus
* won't come or go while it's being called. Used by hotplug cpu.
*/
int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus);
int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus);
#else
static inline int stop_machine(int (*fn)(void *), void *data,
const cpumask_t *cpus)
const struct cpumask *cpus)
{
int ret;
local_irq_disable();

16
include/linux/threads.h
View file

@ -8,17 +8,17 @@
*/
/*
* Maximum supported processors that can run under SMP. This value is
* set via configure setting. The maximum is equal to the size of the
* bitmasks used on that platform, i.e. 32 or 64. Setting this smaller
* saves quite a bit of memory.
* Maximum supported processors. Setting this smaller saves quite a
* bit of memory. Use nr_cpu_ids instead of this except for static bitmaps.
*/
#ifdef CONFIG_SMP
#define NR_CPUS CONFIG_NR_CPUS
#else
#define NR_CPUS 1
#ifndef CONFIG_NR_CPUS
/* FIXME: This should be fixed in the arch's Kconfig */
#define CONFIG_NR_CPUS 1
#endif
/* Places which use this should consider cpumask_var_t. */
#define NR_CPUS CONFIG_NR_CPUS
#define MIN_THREADS_LEFT_FOR_ROOT 4
/*

4
include/linux/tick.h
View file

@ -84,10 +84,10 @@ static inline void tick_cancel_sched_timer(int cpu) { }
# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
extern struct tick_device *tick_get_broadcast_device(void);
extern cpumask_t *tick_get_broadcast_mask(void);
extern struct cpumask *tick_get_broadcast_mask(void);
# ifdef CONFIG_TICK_ONESHOT
extern cpumask_t *tick_get_broadcast_oneshot_mask(void);
extern struct cpumask *tick_get_broadcast_oneshot_mask(void);
# endif
# endif /* BROADCAST */

13
init/main.c
View file

@ -371,12 +371,7 @@ EXPORT_SYMBOL(nr_cpu_ids);
/* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */
static void __init setup_nr_cpu_ids(void)
{
int cpu, highest_cpu = 0;
for_each_possible_cpu(cpu)
highest_cpu = cpu;
nr_cpu_ids = highest_cpu + 1;
nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1;
}
#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
@ -518,9 +513,9 @@ static void __init boot_cpu_init(void)
{
int cpu = smp_processor_id();
/* Mark the boot cpu "present", "online" etc for SMP and UP case */
cpu_set(cpu, cpu_online_map);
cpu_set(cpu, cpu_present_map);
cpu_set(cpu, cpu_possible_map);
set_cpu_online(cpu, true);
set_cpu_present(cpu, true);
set_cpu_possible(cpu, true);
}
void __init __weak smp_setup_processor_id(void)

51
kernel/compat.c
View file

@ -454,16 +454,16 @@ asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
}
static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
unsigned len, cpumask_t *new_mask)
unsigned len, struct cpumask *new_mask)
{
unsigned long *k;
if (len < sizeof(cpumask_t))
memset(new_mask, 0, sizeof(cpumask_t));
else if (len > sizeof(cpumask_t))
len = sizeof(cpumask_t);
if (len < cpumask_size())
memset(new_mask, 0, cpumask_size());
else if (len > cpumask_size())
len = cpumask_size();
k = cpus_addr(*new_mask);
k = cpumask_bits(new_mask);
return compat_get_bitmap(k, user_mask_ptr, len * 8);
}
@ -471,40 +471,51 @@ asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
unsigned int len,
compat_ulong_t __user *user_mask_ptr)
{
cpumask_t new_mask;
cpumask_var_t new_mask;
int retval;
retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask);
if (retval)
return retval;
if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
return -ENOMEM;
return sched_setaffinity(pid, &new_mask);
retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
if (retval)
goto out;
retval = sched_setaffinity(pid, new_mask);
out:
free_cpumask_var(new_mask);
return retval;
}
asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
compat_ulong_t __user *user_mask_ptr)
{
int ret;
cpumask_t mask;
cpumask_var_t mask;
unsigned long *k;
unsigned int min_length = sizeof(cpumask_t);
unsigned int min_length = cpumask_size();
if (NR_CPUS <= BITS_PER_COMPAT_LONG)
if (nr_cpu_ids <= BITS_PER_COMPAT_LONG)
min_length = sizeof(compat_ulong_t);
if (len < min_length)
return -EINVAL;
ret = sched_getaffinity(pid, &mask);
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
ret = sched_getaffinity(pid, mask);
if (ret < 0)
return ret;
goto out;
k = cpus_addr(mask);
k = cpumask_bits(mask);
ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
if (ret)
return ret;
if (ret == 0)
ret = min_length;
return min_length;
out:
free_cpumask_var(mask);
return ret;
}
int get_compat_itimerspec(struct itimerspec *dst,

144
kernel/cpu.c
View file

@ -15,30 +15,8 @@
#include <linux/stop_machine.h>
#include <linux/mutex.h>
/*
* Represents all cpu's present in the system
* In systems capable of hotplug, this map could dynamically grow
* as new cpu's are detected in the system via any platform specific
* method, such as ACPI for e.g.
*/
cpumask_t cpu_present_map __read_mostly;
EXPORT_SYMBOL(cpu_present_map);
/*
* Represents all cpu's that are currently online.
*/
cpumask_t cpu_online_map __read_mostly;
EXPORT_SYMBOL(cpu_online_map);
#ifdef CONFIG_INIT_ALL_POSSIBLE
cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
#else
cpumask_t cpu_possible_map __read_mostly;
#endif
EXPORT_SYMBOL(cpu_possible_map);
#ifdef CONFIG_SMP
/* Serializes the updates to cpu_online_map, cpu_present_map */
/* Serializes the updates to cpu_online_mask, cpu_present_mask */
static DEFINE_MUTEX(cpu_add_remove_lock);
static __cpuinitdata RAW_NOTIFIER_HEAD(cpu_chain);
@ -65,8 +43,6 @@ void __init cpu_hotplug_init(void)
cpu_hotplug.refcount = 0;
}
cpumask_t cpu_active_map;
#ifdef CONFIG_HOTPLUG_CPU
void get_online_cpus(void)
@ -97,7 +73,7 @@ EXPORT_SYMBOL_GPL(put_online_cpus);
/*
* The following two API's must be used when attempting
* to serialize the updates to cpu_online_map, cpu_present_map.
* to serialize the updates to cpu_online_mask, cpu_present_mask.
*/
void cpu_maps_update_begin(void)
{
@ -218,7 +194,7 @@ static int __ref take_cpu_down(void *_param)
static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
{
int err, nr_calls = 0;
cpumask_t old_allowed, tmp;
cpumask_var_t old_allowed;
void *hcpu = (void *)(long)cpu;
unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
struct take_cpu_down_param tcd_param = {
@ -232,6 +208,9 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
if (!cpu_online(cpu))
return -EINVAL;
if (!alloc_cpumask_var(&old_allowed, GFP_KERNEL))
return -ENOMEM;
cpu_hotplug_begin();
err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
hcpu, -1, &nr_calls);
@ -246,13 +225,11 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
}
/* Ensure that we are not runnable on dying cpu */
old_allowed = current->cpus_allowed;
cpus_setall(tmp);
cpu_clear(cpu, tmp);
set_cpus_allowed_ptr(current, &tmp);
tmp = cpumask_of_cpu(cpu);
cpumask_copy(old_allowed, &current->cpus_allowed);
set_cpus_allowed_ptr(current,
cpumask_of(cpumask_any_but(cpu_online_mask, cpu)));
err = __stop_machine(take_cpu_down, &tcd_param, &tmp);
err = __stop_machine(take_cpu_down, &tcd_param, cpumask_of(cpu));
if (err) {
/* CPU didn't die: tell everyone. Can't complain. */
if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
@ -278,7 +255,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
check_for_tasks(cpu);
out_allowed:
set_cpus_allowed_ptr(current, &old_allowed);
set_cpus_allowed_ptr(current, old_allowed);
out_release:
cpu_hotplug_done();
if (!err) {
@ -286,6 +263,7 @@ out_release:
hcpu) == NOTIFY_BAD)
BUG();
}
free_cpumask_var(old_allowed);
return err;
}
@ -304,7 +282,7 @@ int __ref cpu_down(unsigned int cpu)
/*
* Make sure the all cpus did the reschedule and are not
* using stale version of the cpu_active_map.
* using stale version of the cpu_active_mask.
* This is not strictly necessary becuase stop_machine()
* that we run down the line already provides the required
* synchronization. But it's really a side effect and we do not
@ -368,7 +346,7 @@ out_notify:
int __cpuinit cpu_up(unsigned int cpu)
{
int err = 0;
if (!cpu_isset(cpu, cpu_possible_map)) {
if (!cpu_possible(cpu)) {
printk(KERN_ERR "can't online cpu %d because it is not "
"configured as may-hotadd at boot time\n", cpu);
#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
@ -393,25 +371,25 @@ out:
}
#ifdef CONFIG_PM_SLEEP_SMP
static cpumask_t frozen_cpus;
static cpumask_var_t frozen_cpus;
int disable_nonboot_cpus(void)
{
int cpu, first_cpu, error = 0;
cpu_maps_update_begin();
first_cpu = first_cpu(cpu_online_map);
first_cpu = cpumask_first(cpu_online_mask);
/* We take down all of the non-boot CPUs in one shot to avoid races
* with the userspace trying to use the CPU hotplug at the same time
*/
cpus_clear(frozen_cpus);
cpumask_clear(frozen_cpus);
printk("Disabling non-boot CPUs ...\n");
for_each_online_cpu(cpu) {
if (cpu == first_cpu)
continue;
error = _cpu_down(cpu, 1);
if (!error) {
cpu_set(cpu, frozen_cpus);
cpumask_set_cpu(cpu, frozen_cpus);
printk("CPU%d is down\n", cpu);
} else {
printk(KERN_ERR "Error taking CPU%d down: %d\n",
@ -437,11 +415,11 @@ void __ref enable_nonboot_cpus(void)
/* Allow everyone to use the CPU hotplug again */
cpu_maps_update_begin();
cpu_hotplug_disabled = 0;
if (cpus_empty(frozen_cpus))
if (cpumask_empty(frozen_cpus))
goto out;
printk("Enabling non-boot CPUs ...\n");
for_each_cpu_mask_nr(cpu, frozen_cpus) {
for_each_cpu(cpu, frozen_cpus) {
error = _cpu_up(cpu, 1);
if (!error) {
printk("CPU%d is up\n", cpu);
@ -449,10 +427,18 @@ void __ref enable_nonboot_cpus(void)
}
printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
}
cpus_clear(frozen_cpus);
cpumask_clear(frozen_cpus);
out:
cpu_maps_update_done();
}
static int alloc_frozen_cpus(void)
{
if (!alloc_cpumask_var(&frozen_cpus, GFP_KERNEL|__GFP_ZERO))
return -ENOMEM;
return 0;
}
core_initcall(alloc_frozen_cpus);
#endif /* CONFIG_PM_SLEEP_SMP */
/**
@ -468,7 +454,7 @@ void __cpuinit notify_cpu_starting(unsigned int cpu)
unsigned long val = CPU_STARTING;
#ifdef CONFIG_PM_SLEEP_SMP
if (cpu_isset(cpu, frozen_cpus))
if (frozen_cpus != NULL && cpumask_test_cpu(cpu, frozen_cpus))
val = CPU_STARTING_FROZEN;
#endif /* CONFIG_PM_SLEEP_SMP */
raw_notifier_call_chain(&cpu_chain, val, (void *)(long)cpu);
@ -480,7 +466,7 @@ void __cpuinit notify_cpu_starting(unsigned int cpu)
* cpu_bit_bitmap[] is a special, "compressed" data structure that
* represents all NR_CPUS bits binary values of 1<<nr.
*
* It is used by cpumask_of_cpu() to get a constant address to a CPU
* It is used by cpumask_of() to get a constant address to a CPU
* mask value that has a single bit set only.
*/
@ -503,3 +489,71 @@ EXPORT_SYMBOL_GPL(cpu_bit_bitmap);
const DECLARE_BITMAP(cpu_all_bits, NR_CPUS) = CPU_BITS_ALL;
EXPORT_SYMBOL(cpu_all_bits);
#ifdef CONFIG_INIT_ALL_POSSIBLE
static DECLARE_BITMAP(cpu_possible_bits, CONFIG_NR_CPUS) __read_mostly
= CPU_BITS_ALL;
#else
static DECLARE_BITMAP(cpu_possible_bits, CONFIG_NR_CPUS) __read_mostly;
#endif
const struct cpumask *const cpu_possible_mask = to_cpumask(cpu_possible_bits);
EXPORT_SYMBOL(cpu_possible_mask);
static DECLARE_BITMAP(cpu_online_bits, CONFIG_NR_CPUS) __read_mostly;
const struct cpumask *const cpu_online_mask = to_cpumask(cpu_online_bits);
EXPORT_SYMBOL(cpu_online_mask);
static DECLARE_BITMAP(cpu_present_bits, CONFIG_NR_CPUS) __read_mostly;
const struct cpumask *const cpu_present_mask = to_cpumask(cpu_present_bits);
EXPORT_SYMBOL(cpu_present_mask);
static DECLARE_BITMAP(cpu_active_bits, CONFIG_NR_CPUS) __read_mostly;
const struct cpumask *const cpu_active_mask = to_cpumask(cpu_active_bits);
EXPORT_SYMBOL(cpu_active_mask);
void set_cpu_possible(unsigned int cpu, bool possible)
{
if (possible)
cpumask_set_cpu(cpu, to_cpumask(cpu_possible_bits));
else
cpumask_clear_cpu(cpu, to_cpumask(cpu_possible_bits));
}
void set_cpu_present(unsigned int cpu, bool present)
{
if (present)
cpumask_set_cpu(cpu, to_cpumask(cpu_present_bits));
else
cpumask_clear_cpu(cpu, to_cpumask(cpu_present_bits));
}
void set_cpu_online(unsigned int cpu, bool online)
{
if (online)
cpumask_set_cpu(cpu, to_cpumask(cpu_online_bits));
else
cpumask_clear_cpu(cpu, to_cpumask(cpu_online_bits));
}
void set_cpu_active(unsigned int cpu, bool active)
{
if (active)
cpumask_set_cpu(cpu, to_cpumask(cpu_active_bits));
else
cpumask_clear_cpu(cpu, to_cpumask(cpu_active_bits));
}
void init_cpu_present(const struct cpumask *src)
{
cpumask_copy(to_cpumask(cpu_present_bits), src);
}
void init_cpu_possible(const struct cpumask *src)
{
cpumask_copy(to_cpumask(cpu_possible_bits), src);
}
void init_cpu_online(const struct cpumask *src)
{
cpumask_copy(to_cpumask(cpu_online_bits), src);
}

11
kernel/irq/manage.c
View file

@ -16,8 +16,15 @@
#include "internals.h"
#ifdef CONFIG_SMP
cpumask_var_t irq_default_affinity;
cpumask_t irq_default_affinity = CPU_MASK_ALL;
static int init_irq_default_affinity(void)
{
alloc_cpumask_var(&irq_default_affinity, GFP_KERNEL);
cpumask_setall(irq_default_affinity);
return 0;
}
core_initcall(init_irq_default_affinity);
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
@ -127,7 +134,7 @@ int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
desc->status &= ~IRQ_AFFINITY_SET;
}
cpumask_and(&desc->affinity, cpu_online_mask, &irq_default_affinity);
cpumask_and(&desc->affinity, cpu_online_mask, irq_default_affinity);
set_affinity:
desc->chip->set_affinity(irq, &desc->affinity);

36
kernel/irq/proc.c
View file

@ -20,7 +20,7 @@ static struct proc_dir_entry *root_irq_dir;
static int irq_affinity_proc_show(struct seq_file *m, void *v)
{
struct irq_desc *desc = irq_to_desc((long)m->private);
cpumask_t *mask = &desc->affinity;
const struct cpumask *mask = &desc->affinity;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PENDING)
@ -54,7 +54,7 @@ static ssize_t irq_affinity_proc_write(struct file *file,
if (err)
goto free_cpumask;
if (!is_affinity_mask_valid(*new_value)) {
if (!is_affinity_mask_valid(new_value)) {
err = -EINVAL;
goto free_cpumask;
}
@ -93,7 +93,7 @@ static const struct file_operations irq_affinity_proc_fops = {
static int default_affinity_show(struct seq_file *m, void *v)
{
seq_cpumask(m, &irq_default_affinity);
seq_cpumask(m, irq_default_affinity);
seq_putc(m, '\n');
return 0;
}
@ -101,27 +101,37 @@ static int default_affinity_show(struct seq_file *m, void *v)
static ssize_t default_affinity_write(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos)
{
cpumask_t new_value;
cpumask_var_t new_value;
int err;
err = cpumask_parse_user(buffer, count, &new_value);
if (err)
return err;
if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
return -ENOMEM;
if (!is_affinity_mask_valid(new_value))
return -EINVAL;
err = cpumask_parse_user(buffer, count, new_value);
if (err)
goto out;
if (!is_affinity_mask_valid(new_value)) {
err = -EINVAL;
goto out;
}
/*
* Do not allow disabling IRQs completely - it's a too easy
* way to make the system unusable accidentally :-) At least
* one online CPU still has to be targeted.
*/
if (!cpus_intersects(new_value, cpu_online_map))
return -EINVAL;
if (!cpumask_intersects(new_value, cpu_online_mask)) {
err = -EINVAL;
goto out;
}
irq_default_affinity = new_value;
cpumask_copy(irq_default_affinity, new_value);
err = count;
return count;
out:
free_cpumask_var(new_value);
return err;
}
static int default_affinity_open(struct inode *inode, struct file *file)

2
kernel/kexec.c
View file

@ -1116,7 +1116,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
struct elf_prstatus prstatus;
u32 *buf;
if ((cpu < 0) || (cpu >= NR_CPUS))
if ((cpu < 0) || (cpu >= nr_cpu_ids))
return;
/* Using ELF notes here is opportunistic.

2
kernel/power/poweroff.c
View file

@ -27,7 +27,7 @@ static DECLARE_WORK(poweroff_work, do_poweroff);
static void handle_poweroff(int key, struct tty_struct *tty)
{
/* run sysrq poweroff on boot cpu */
schedule_work_on(first_cpu(cpu_online_map), &poweroff_work);
schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
}
static struct sysrq_key_op sysrq_poweroff_op = {

38
kernel/profile.c
View file

@ -45,7 +45,7 @@ static unsigned long prof_len, prof_shift;
int prof_on __read_mostly;
EXPORT_SYMBOL_GPL(prof_on);
static cpumask_t prof_cpu_mask = CPU_MASK_ALL;
static cpumask_var_t prof_cpu_mask;
#ifdef CONFIG_SMP
static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits);
static DEFINE_PER_CPU(int, cpu_profile_flip);
@ -113,9 +113,13 @@ int __ref profile_init(void)
buffer_bytes = prof_len*sizeof(atomic_t);
if (!slab_is_available()) {
prof_buffer = alloc_bootmem(buffer_bytes);
alloc_bootmem_cpumask_var(&prof_cpu_mask);
return 0;
}
if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
return -ENOMEM;
prof_buffer = kzalloc(buffer_bytes, GFP_KERNEL);
if (prof_buffer)
return 0;
@ -128,6 +132,7 @@ int __ref profile_init(void)
if (prof_buffer)
return 0;
free_cpumask_var(prof_cpu_mask);
return -ENOMEM;
}
@ -386,13 +391,15 @@ out_free:
return NOTIFY_BAD;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cpu_set(cpu, prof_cpu_mask);
if (prof_cpu_mask != NULL)
cpumask_set_cpu(cpu, prof_cpu_mask);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
cpu_clear(cpu, prof_cpu_mask);
if (prof_cpu_mask != NULL)
cpumask_clear_cpu(cpu, prof_cpu_mask);
if (per_cpu(cpu_profile_hits, cpu)[0]) {
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
per_cpu(cpu_profile_hits, cpu)[0] = NULL;
@ -430,7 +437,8 @@ void profile_tick(int type)
if (type == CPU_PROFILING && timer_hook)
timer_hook(regs);
if (!user_mode(regs) && cpu_isset(smp_processor_id(), prof_cpu_mask))
if (!user_mode(regs) && prof_cpu_mask != NULL &&
cpumask_test_cpu(smp_processor_id(), prof_cpu_mask))
profile_hit(type, (void *)profile_pc(regs));
}
@ -442,7 +450,7 @@ void profile_tick(int type)
static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int len = cpumask_scnprintf(page, count, (cpumask_t *)data);
int len = cpumask_scnprintf(page, count, data);
if (count - len < 2)
return -EINVAL;
len += sprintf(page + len, "\n");
@ -452,16 +460,20 @@ static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
static int prof_cpu_mask_write_proc(struct file *file,
const char __user *buffer, unsigned long count, void *data)
{
cpumask_t *mask = (cpumask_t *)data;
struct cpumask *mask = data;
unsigned long full_count = count, err;
cpumask_t new_value;
cpumask_var_t new_value;
err = cpumask_parse_user(buffer, count, &new_value);
if (err)
return err;
if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
return -ENOMEM;
*mask = new_value;
return full_count;
err = cpumask_parse_user(buffer, count, new_value);
if (!err) {
cpumask_copy(mask, new_value);
err = full_count;
}
free_cpumask_var(new_value);
return err;
}
void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
@ -472,7 +484,7 @@ void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
entry = create_proc_entry("prof_cpu_mask", 0600, root_irq_dir);
if (!entry)
return;
entry->data = (void *)&prof_cpu_mask;
entry->data = prof_cpu_mask;
entry->read_proc = prof_cpu_mask_read_proc;
entry->write_proc = prof_cpu_mask_write_proc;
}

32
kernel/rcuclassic.c
View file

@ -63,14 +63,14 @@ static struct rcu_ctrlblk rcu_ctrlblk = {
.completed = -300,
.pending = -300,
.lock = __SPIN_LOCK_UNLOCKED(&rcu_ctrlblk.lock),
.cpumask = CPU_MASK_NONE,
.cpumask = CPU_BITS_NONE,
};
static struct rcu_ctrlblk rcu_bh_ctrlblk = {
.cur = -300,
.completed = -300,
.pending = -300,
.lock = __SPIN_LOCK_UNLOCKED(&rcu_bh_ctrlblk.lock),
.cpumask = CPU_MASK_NONE,
.cpumask = CPU_BITS_NONE,
};
DEFINE_PER_CPU(struct rcu_data, rcu_data) = { 0L };
@ -85,7 +85,6 @@ static void force_quiescent_state(struct rcu_data *rdp,
struct rcu_ctrlblk *rcp)
{
int cpu;
cpumask_t cpumask;
unsigned long flags;
set_need_resched();
@ -96,10 +95,10 @@ static void force_quiescent_state(struct rcu_data *rdp,
* Don't send IPI to itself. With irqs disabled,
* rdp->cpu is the current cpu.
*
* cpu_online_map is updated by the _cpu_down()
* cpu_online_mask is updated by the _cpu_down()
* using __stop_machine(). Since we're in irqs disabled
* section, __stop_machine() is not exectuting, hence
* the cpu_online_map is stable.
* the cpu_online_mask is stable.
*
* However, a cpu might have been offlined _just_ before
* we disabled irqs while entering here.
@ -107,13 +106,14 @@ static void force_quiescent_state(struct rcu_data *rdp,
* notification, leading to the offlined cpu's bit
* being set in the rcp->cpumask.
*
* Hence cpumask = (rcp->cpumask & cpu_online_map) to prevent
* Hence cpumask = (rcp->cpumask & cpu_online_mask) to prevent
* sending smp_reschedule() to an offlined CPU.
*/
cpus_and(cpumask, rcp->cpumask, cpu_online_map);
cpu_clear(rdp->cpu, cpumask);
for_each_cpu_mask_nr(cpu, cpumask)
smp_send_reschedule(cpu);
for_each_cpu_and(cpu,
to_cpumask(rcp->cpumask), cpu_online_mask) {
if (cpu != rdp->cpu)
smp_send_reschedule(cpu);
}
}
spin_unlock_irqrestore(&rcp->lock, flags);
}
@ -193,7 +193,7 @@ static void print_other_cpu_stall(struct rcu_ctrlblk *rcp)
printk(KERN_ERR "INFO: RCU detected CPU stalls:");
for_each_possible_cpu(cpu) {
if (cpu_isset(cpu, rcp->cpumask))
if (cpumask_test_cpu(cpu, to_cpumask(rcp->cpumask)))
printk(" %d", cpu);
}
printk(" (detected by %d, t=%ld jiffies)\n",
@ -221,7 +221,8 @@ static void check_cpu_stall(struct rcu_ctrlblk *rcp)
long delta;
delta = jiffies - rcp->jiffies_stall;
if (cpu_isset(smp_processor_id(), rcp->cpumask) && delta >= 0) {
if (cpumask_test_cpu(smp_processor_id(), to_cpumask(rcp->cpumask)) &&
delta >= 0) {
/* We haven't checked in, so go dump stack. */
print_cpu_stall(rcp);
@ -393,7 +394,8 @@ static void rcu_start_batch(struct rcu_ctrlblk *rcp)
* unnecessarily.
*/
smp_mb();
cpumask_andnot(&rcp->cpumask, cpu_online_mask, nohz_cpu_mask);
cpumask_andnot(to_cpumask(rcp->cpumask),
cpu_online_mask, nohz_cpu_mask);
rcp->signaled = 0;
}
@ -406,8 +408,8 @@ static void rcu_start_batch(struct rcu_ctrlblk *rcp)
*/
static void cpu_quiet(int cpu, struct rcu_ctrlblk *rcp)
{
cpu_clear(cpu, rcp->cpumask);
if (cpus_empty(rcp->cpumask)) {
cpumask_clear_cpu(cpu, to_cpumask(rcp->cpumask));
if (cpumask_empty(to_cpumask(rcp->cpumask))) {
/* batch completed ! */
rcp->completed = rcp->cur;
rcu_start_batch(rcp);

19
kernel/rcupreempt.c
View file

@ -164,7 +164,8 @@ static char *rcu_try_flip_state_names[] =
{ "idle", "waitack", "waitzero", "waitmb" };
#endif /* #ifdef CONFIG_RCU_TRACE */
static cpumask_t rcu_cpu_online_map __read_mostly = CPU_MASK_NONE;
static DECLARE_BITMAP(rcu_cpu_online_map, NR_CPUS) __read_mostly
= CPU_BITS_NONE;
/*
* Enum and per-CPU flag to determine when each CPU has seen
@ -758,7 +759,7 @@ rcu_try_flip_idle(void)
/* Now ask each CPU for acknowledgement of the flip. */
for_each_cpu_mask_nr(cpu, rcu_cpu_online_map) {
for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map)) {
per_cpu(rcu_flip_flag, cpu) = rcu_flipped;
dyntick_save_progress_counter(cpu);
}
@ -776,7 +777,7 @@ rcu_try_flip_waitack(void)
int cpu;
RCU_TRACE_ME(rcupreempt_trace_try_flip_a1);
for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
if (rcu_try_flip_waitack_needed(cpu) &&
per_cpu(rcu_flip_flag, cpu) != rcu_flip_seen) {
RCU_TRACE_ME(rcupreempt_trace_try_flip_ae1);
@ -808,7 +809,7 @@ rcu_try_flip_waitzero(void)
/* Check to see if the sum of the "last" counters is zero. */
RCU_TRACE_ME(rcupreempt_trace_try_flip_z1);
for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
sum += RCU_DATA_CPU(cpu)->rcu_flipctr[lastidx];
if (sum != 0) {
RCU_TRACE_ME(rcupreempt_trace_try_flip_ze1);
@ -823,7 +824,7 @@ rcu_try_flip_waitzero(void)
smp_mb(); /* ^^^^^^^^^^^^ */
/* Call for a memory barrier from each CPU. */
for_each_cpu_mask_nr(cpu, rcu_cpu_online_map) {
for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map)) {
per_cpu(rcu_mb_flag, cpu) = rcu_mb_needed;
dyntick_save_progress_counter(cpu);
}
@ -843,7 +844,7 @@ rcu_try_flip_waitmb(void)
int cpu;
RCU_TRACE_ME(rcupreempt_trace_try_flip_m1);
for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
if (rcu_try_flip_waitmb_needed(cpu) &&
per_cpu(rcu_mb_flag, cpu) != rcu_mb_done) {
RCU_TRACE_ME(rcupreempt_trace_try_flip_me1);
@ -1032,7 +1033,7 @@ void rcu_offline_cpu(int cpu)
RCU_DATA_CPU(cpu)->rcu_flipctr[0] = 0;
RCU_DATA_CPU(cpu)->rcu_flipctr[1] = 0;
cpu_clear(cpu, rcu_cpu_online_map);
cpumask_clear_cpu(cpu, to_cpumask(rcu_cpu_online_map));
spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
@ -1072,7 +1073,7 @@ void __cpuinit rcu_online_cpu(int cpu)
struct rcu_data *rdp;
spin_lock_irqsave(&rcu_ctrlblk.fliplock, flags);
cpu_set(cpu, rcu_cpu_online_map);
cpumask_set_cpu(cpu, to_cpumask(rcu_cpu_online_map));
spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
/*
@ -1430,7 +1431,7 @@ void __init __rcu_init(void)
* We don't need protection against CPU-Hotplug here
* since
* a) If a CPU comes online while we are iterating over the
* cpu_online_map below, we would only end up making a
* cpu_online_mask below, we would only end up making a
* duplicate call to rcu_online_cpu() which sets the corresponding
* CPU's mask in the rcu_cpu_online_map.
*

27
kernel/rcutorture.c
View file

@ -868,49 +868,52 @@ static int rcu_idle_cpu; /* Force all torture tasks off this CPU */
*/
static void rcu_torture_shuffle_tasks(void)
{
cpumask_t tmp_mask;
cpumask_var_t tmp_mask;
int i;
cpus_setall(tmp_mask);
if (!alloc_cpumask_var(&tmp_mask, GFP_KERNEL))
BUG();
cpumask_setall(tmp_mask);
get_online_cpus();
/* No point in shuffling if there is only one online CPU (ex: UP) */
if (num_online_cpus() == 1) {
put_online_cpus();
return;
}
if (num_online_cpus() == 1)
goto out;
if (rcu_idle_cpu != -1)
cpu_clear(rcu_idle_cpu, tmp_mask);
cpumask_clear_cpu(rcu_idle_cpu, tmp_mask);
set_cpus_allowed_ptr(current, &tmp_mask);
set_cpus_allowed_ptr(current, tmp_mask);
if (reader_tasks) {
for (i = 0; i < nrealreaders; i++)
if (reader_tasks[i])
set_cpus_allowed_ptr(reader_tasks[i],
&tmp_mask);
tmp_mask);
}
if (fakewriter_tasks) {
for (i = 0; i < nfakewriters; i++)
if (fakewriter_tasks[i])
set_cpus_allowed_ptr(fakewriter_tasks[i],
&tmp_mask);
tmp_mask);
}
if (writer_task)
set_cpus_allowed_ptr(writer_task, &tmp_mask);
set_cpus_allowed_ptr(writer_task, tmp_mask);
if (stats_task)
set_cpus_allowed_ptr(stats_task, &tmp_mask);
set_cpus_allowed_ptr(stats_task, tmp_mask);
if (rcu_idle_cpu == -1)
rcu_idle_cpu = num_online_cpus() - 1;
else
rcu_idle_cpu--;
out:
put_online_cpus();
free_cpumask_var(tmp_mask);
}
/* Shuffle tasks across CPUs, with the intent of allowing each CPU in the

53
kernel/sched.c
View file

@ -3715,7 +3715,7 @@ redo:
* don't kick the migration_thread, if the curr
* task on busiest cpu can't be moved to this_cpu
*/
if (!cpu_isset(this_cpu, busiest->curr->cpus_allowed)) {
if (!cpumask_test_cpu(this_cpu, &busiest->curr->cpus_allowed)) {
double_unlock_balance(this_rq, busiest);
all_pinned = 1;
return ld_moved;
@ -6257,9 +6257,7 @@ static int __migrate_task_irq(struct task_struct *p, int src_cpu, int dest_cpu)
static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
{
int dest_cpu;
/* FIXME: Use cpumask_of_node here. */
cpumask_t _nodemask = node_to_cpumask(cpu_to_node(dead_cpu));
const struct cpumask *nodemask = &_nodemask;
const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(dead_cpu));
again:
/* Look for allowed, online CPU in same node. */
@ -7170,21 +7168,18 @@ static int find_next_best_node(int node, nodemask_t *used_nodes)
static void sched_domain_node_span(int node, struct cpumask *span)
{
nodemask_t used_nodes;
/* FIXME: use cpumask_of_node() */
node_to_cpumask_ptr(nodemask, node);
int i;
cpus_clear(*span);
cpumask_clear(span);
nodes_clear(used_nodes);
cpus_or(*span, *span, *nodemask);
cpumask_or(span, span, cpumask_of_node(node));
node_set(node, used_nodes);
for (i = 1; i < SD_NODES_PER_DOMAIN; i++) {
int next_node = find_next_best_node(node, &used_nodes);
node_to_cpumask_ptr_next(nodemask, next_node);
cpus_or(*span, *span, *nodemask);
cpumask_or(span, span, cpumask_of_node(next_node));
}
}
#endif /* CONFIG_NUMA */
@ -7264,9 +7259,7 @@ cpu_to_phys_group(int cpu, const struct cpumask *cpu_map,
{
int group;
#ifdef CONFIG_SCHED_MC
/* FIXME: Use cpu_coregroup_mask. */
*mask = cpu_coregroup_map(cpu);
cpus_and(*mask, *mask, *cpu_map);
cpumask_and(mask, cpu_coregroup_mask(cpu), cpu_map);
group = cpumask_first(mask);
#elif defined(CONFIG_SCHED_SMT)
cpumask_and(mask, &per_cpu(cpu_sibling_map, cpu), cpu_map);
@ -7296,10 +7289,8 @@ static int cpu_to_allnodes_group(int cpu, const struct cpumask *cpu_map,
struct cpumask *nodemask)
{
int group;
/* FIXME: use cpumask_of_node */
node_to_cpumask_ptr(pnodemask, cpu_to_node(cpu));
cpumask_and(nodemask, pnodemask, cpu_map);
cpumask_and(nodemask, cpumask_of_node(cpu_to_node(cpu)), cpu_map);
group = cpumask_first(nodemask);
if (sg)
@ -7350,10 +7341,8 @@ static void free_sched_groups(const struct cpumask *cpu_map,
for (i = 0; i < nr_node_ids; i++) {
struct sched_group *oldsg, *sg = sched_group_nodes[i];
/* FIXME: Use cpumask_of_node */
node_to_cpumask_ptr(pnodemask, i);
cpus_and(*nodemask, *pnodemask, *cpu_map);
cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
if (cpumask_empty(nodemask))
continue;
@ -7562,9 +7551,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
for_each_cpu(i, cpu_map) {
struct sched_domain *sd = NULL, *p;
/* FIXME: use cpumask_of_node */
*nodemask = node_to_cpumask(cpu_to_node(i));
cpus_and(*nodemask, *nodemask, *cpu_map);
cpumask_and(nodemask, cpumask_of_node(cpu_to_node(i)), cpu_map);
#ifdef CONFIG_NUMA
if (cpumask_weight(cpu_map) >
@ -7605,9 +7592,8 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
sd = &per_cpu(core_domains, i).sd;
SD_INIT(sd, MC);
set_domain_attribute(sd, attr);
*sched_domain_span(sd) = cpu_coregroup_map(i);
cpumask_and(sched_domain_span(sd),
sched_domain_span(sd), cpu_map);
cpumask_and(sched_domain_span(sd), cpu_map,
cpu_coregroup_mask(i));
sd->parent = p;
p->child = sd;
cpu_to_core_group(i, cpu_map, &sd->groups, tmpmask);
@ -7643,9 +7629,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
#ifdef CONFIG_SCHED_MC
/* Set up multi-core groups */
for_each_cpu(i, cpu_map) {
/* FIXME: Use cpu_coregroup_mask */
*this_core_map = cpu_coregroup_map(i);
cpus_and(*this_core_map, *this_core_map, *cpu_map);
cpumask_and(this_core_map, cpu_coregroup_mask(i), cpu_map);
if (i != cpumask_first(this_core_map))
continue;
@ -7657,9 +7641,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
/* Set up physical groups */
for (i = 0; i < nr_node_ids; i++) {
/* FIXME: Use cpumask_of_node */
*nodemask = node_to_cpumask(i);
cpus_and(*nodemask, *nodemask, *cpu_map);
cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
if (cpumask_empty(nodemask))
continue;
@ -7681,11 +7663,8 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
struct sched_group *sg, *prev;
int j;
/* FIXME: Use cpumask_of_node */
*nodemask = node_to_cpumask(i);
cpumask_clear(covered);
cpus_and(*nodemask, *nodemask, *cpu_map);
cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
if (cpumask_empty(nodemask)) {
sched_group_nodes[i] = NULL;
continue;
@ -7716,8 +7695,6 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
for (j = 0; j < nr_node_ids; j++) {
int n = (i + j) % nr_node_ids;
/* FIXME: Use cpumask_of_node */
node_to_cpumask_ptr(pnodemask, n);
cpumask_complement(notcovered, covered);
cpumask_and(tmpmask, notcovered, cpu_map);
@ -7725,7 +7702,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
if (cpumask_empty(tmpmask))
break;
cpumask_and(tmpmask, tmpmask, pnodemask);
cpumask_and(tmpmask, tmpmask, cpumask_of_node(n));
if (cpumask_empty(tmpmask))
continue;

3
kernel/sched_rt.c
View file

@ -1383,7 +1383,8 @@ static inline void init_sched_rt_class(void)
unsigned int i;
for_each_possible_cpu(i)
alloc_cpumask_var(&per_cpu(local_cpu_mask, i), GFP_KERNEL);
alloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
GFP_KERNEL, cpu_to_node(i));
}
#endif /* CONFIG_SMP */

143
kernel/smp.c
View file

@ -24,8 +24,8 @@ struct call_function_data {
struct call_single_data csd;
spinlock_t lock;
unsigned int refs;
cpumask_t cpumask;
struct rcu_head rcu_head;
unsigned long cpumask_bits[];
};
struct call_single_queue {
@ -110,13 +110,13 @@ void generic_smp_call_function_interrupt(void)
list_for_each_entry_rcu(data, &call_function_queue, csd.list) {
int refs;
if (!cpu_isset(cpu, data->cpumask))
if (!cpumask_test_cpu(cpu, to_cpumask(data->cpumask_bits)))
continue;
data->csd.func(data->csd.info);
spin_lock(&data->lock);
cpu_clear(cpu, data->cpumask);
cpumask_clear_cpu(cpu, to_cpumask(data->cpumask_bits));
WARN_ON(data->refs == 0);
data->refs--;
refs = data->refs;
@ -223,7 +223,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
local_irq_save(flags);
func(info);
local_irq_restore(flags);
} else if ((unsigned)cpu < NR_CPUS && cpu_online(cpu)) {
} else if ((unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) {
struct call_single_data *data = NULL;
if (!wait) {
@ -266,51 +266,19 @@ void __smp_call_function_single(int cpu, struct call_single_data *data)
generic_exec_single(cpu, data);
}
/* Dummy function */
static void quiesce_dummy(void *unused)
{
}
/*
* Ensure stack based data used in call function mask is safe to free.
*
* This is needed by smp_call_function_mask when using on-stack data, because
* a single call function queue is shared by all CPUs, and any CPU may pick up
* the data item on the queue at any time before it is deleted. So we need to
* ensure that all CPUs have transitioned through a quiescent state after
* this call.
*
* This is a very slow function, implemented by sending synchronous IPIs to
* all possible CPUs. For this reason, we have to alloc data rather than use
* stack based data even in the case of synchronous calls. The stack based
* data is then just used for deadlock/oom fallback which will be very rare.
*
* If a faster scheme can be made, we could go back to preferring stack based
* data -- the data allocation/free is non-zero cost.
*/
static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
{
struct call_single_data data;
int cpu;
data.func = quiesce_dummy;
data.info = NULL;
for_each_cpu_mask(cpu, mask) {
data.flags = CSD_FLAG_WAIT;
generic_exec_single(cpu, &data);
}
}
/* FIXME: Shim for archs using old arch_send_call_function_ipi API. */
#ifndef arch_send_call_function_ipi_mask
#define arch_send_call_function_ipi_mask(maskp) \
arch_send_call_function_ipi(*(maskp))
#endif
/**
* smp_call_function_mask(): Run a function on a set of other CPUs.
* @mask: The set of cpus to run on.
* smp_call_function_many(): Run a function on a set of other CPUs.
* @mask: The set of cpus to run on (only runs on online subset).
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed on other CPUs.
*
* Returns 0 on success, else a negative status code.
*
* If @wait is true, then returns once @func has returned. Note that @wait
* will be implicitly turned on in case of allocation failures, since
* we fall back to on-stack allocation.
@ -319,53 +287,57 @@ static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
* hardware interrupt handler or from a bottom half handler. Preemption
* must be disabled when calling this function.
*/
int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
int wait)
void smp_call_function_many(const struct cpumask *mask,
void (*func)(void *), void *info,
bool wait)
{
struct call_function_data d;
struct call_function_data *data = NULL;
cpumask_t allbutself;
struct call_function_data *data;
unsigned long flags;
int cpu, num_cpus;
int slowpath = 0;
int cpu, next_cpu;
/* Can deadlock when called with interrupts disabled */
WARN_ON(irqs_disabled());
cpu = smp_processor_id();
allbutself = cpu_online_map;
cpu_clear(cpu, allbutself);
cpus_and(mask, mask, allbutself);
num_cpus = cpus_weight(mask);
/* So, what's a CPU they want? Ignoring this one. */
cpu = cpumask_first_and(mask, cpu_online_mask);
if (cpu == smp_processor_id())
cpu = cpumask_next_and(cpu, mask, cpu_online_mask);
/* No online cpus? We're done. */
if (cpu >= nr_cpu_ids)
return;
/*
* If zero CPUs, return. If just a single CPU, turn this request
* into a targetted single call instead since it's faster.
*/
if (!num_cpus)
return 0;
else if (num_cpus == 1) {
cpu = first_cpu(mask);
return smp_call_function_single(cpu, func, info, wait);
/* Do we have another CPU which isn't us? */
next_cpu = cpumask_next_and(cpu, mask, cpu_online_mask);
if (next_cpu == smp_processor_id())
next_cpu = cpumask_next_and(next_cpu, mask, cpu_online_mask);
/* Fastpath: do that cpu by itself. */
if (next_cpu >= nr_cpu_ids) {
smp_call_function_single(cpu, func, info, wait);
return;
}
data = kmalloc(sizeof(*data), GFP_ATOMIC);
if (data) {
data->csd.flags = CSD_FLAG_ALLOC;
if (wait)
data->csd.flags |= CSD_FLAG_WAIT;
} else {
data = &d;
data->csd.flags = CSD_FLAG_WAIT;
wait = 1;
slowpath = 1;
data = kmalloc(sizeof(*data) + cpumask_size(), GFP_ATOMIC);
if (unlikely(!data)) {
/* Slow path. */
for_each_online_cpu(cpu) {
if (cpu == smp_processor_id())
continue;
if (cpumask_test_cpu(cpu, mask))
smp_call_function_single(cpu, func, info, wait);
}
return;
}
spin_lock_init(&data->lock);
data->csd.flags = CSD_FLAG_ALLOC;
if (wait)
data->csd.flags |= CSD_FLAG_WAIT;
data->csd.func = func;
data->csd.info = info;
data->refs = num_cpus;
data->cpumask = mask;
cpumask_and(to_cpumask(data->cpumask_bits), mask, cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), to_cpumask(data->cpumask_bits));
data->refs = cpumask_weight(to_cpumask(data->cpumask_bits));
spin_lock_irqsave(&call_function_lock, flags);
list_add_tail_rcu(&data->csd.list, &call_function_queue);
@ -377,18 +349,13 @@ int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
smp_mb();
/* Send a message to all CPUs in the map */
arch_send_call_function_ipi(mask);
arch_send_call_function_ipi_mask(to_cpumask(data->cpumask_bits));
/* optionally wait for the CPUs to complete */
if (wait) {
if (wait)
csd_flag_wait(&data->csd);
if (unlikely(slowpath))
smp_call_function_mask_quiesce_stack(mask);
}
return 0;
}
EXPORT_SYMBOL(smp_call_function_mask);
EXPORT_SYMBOL(smp_call_function_many);
/**
* smp_call_function(): Run a function on all other CPUs.
@ -396,7 +363,7 @@ EXPORT_SYMBOL(smp_call_function_mask);
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed on other CPUs.
*
* Returns 0 on success, else a negative status code.
* Returns 0.
*
* If @wait is true, then returns once @func has returned; otherwise
* it returns just before the target cpu calls @func. In case of allocation
@ -407,12 +374,10 @@ EXPORT_SYMBOL(smp_call_function_mask);
*/
int smp_call_function(void (*func)(void *), void *info, int wait)
{
int ret;
preempt_disable();
ret = smp_call_function_mask(cpu_online_map, func, info, wait);
smp_call_function_many(cpu_online_mask, func, info, wait);
preempt_enable();
return ret;
return 0;
}
EXPORT_SYMBOL(smp_call_function);

2
kernel/softirq.c
View file

@ -733,7 +733,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
break;
/* Unbind so it can run. Fall thru. */
kthread_bind(per_cpu(ksoftirqd, hotcpu),
any_online_cpu(cpu_online_map));
cpumask_any(cpu_online_mask));
case CPU_DEAD:
case CPU_DEAD_FROZEN: {
struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };

10
kernel/softlockup.c
View file

@ -303,17 +303,15 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
break;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
check_cpu = any_online_cpu(cpu_online_map);
check_cpu = cpumask_any(cpu_online_mask);
wake_up_process(per_cpu(watchdog_task, hotcpu));
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
if (hotcpu == check_cpu) {
cpumask_t temp_cpu_online_map = cpu_online_map;
cpu_clear(hotcpu, temp_cpu_online_map);
check_cpu = any_online_cpu(temp_cpu_online_map);
/* Pick any other online cpu. */
check_cpu = cpumask_any_but(cpu_online_mask, hotcpu);
}
break;
@ -323,7 +321,7 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
break;
/* Unbind so it can run. Fall thru. */
kthread_bind(per_cpu(watchdog_task, hotcpu),
any_online_cpu(cpu_online_map));
cpumask_any(cpu_online_mask));
case CPU_DEAD:
case CPU_DEAD_FROZEN:
p = per_cpu(watchdog_task, hotcpu);

8
kernel/stop_machine.c
View file

@ -69,10 +69,10 @@ static void stop_cpu(struct work_struct *unused)
int err;
if (!active_cpus) {
if (cpu == first_cpu(cpu_online_map))
if (cpu == cpumask_first(cpu_online_mask))
smdata = &active;
} else {
if (cpu_isset(cpu, *active_cpus))
if (cpumask_test_cpu(cpu, active_cpus))
smdata = &active;
}
/* Simple state machine */
@ -109,7 +109,7 @@ static int chill(void *unused)
return 0;
}
int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus)
{
struct work_struct *sm_work;
int i, ret;
@ -142,7 +142,7 @@ int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
return ret;
}
int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus)
{
int ret;

41
kernel/taskstats.c
View file

@ -290,18 +290,17 @@ ret:
return;
}
static int add_del_listener(pid_t pid, cpumask_t *maskp, int isadd)
static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
{
struct listener_list *listeners;
struct listener *s, *tmp;
unsigned int cpu;
cpumask_t mask = *maskp;
if (!cpus_subset(mask, cpu_possible_map))
if (!cpumask_subset(mask, cpu_possible_mask))
return -EINVAL;
if (isadd == REGISTER) {
for_each_cpu_mask_nr(cpu, mask) {
for_each_cpu(cpu, mask) {
s = kmalloc_node(sizeof(struct listener), GFP_KERNEL,
cpu_to_node(cpu));
if (!s)
@ -320,7 +319,7 @@ static int add_del_listener(pid_t pid, cpumask_t *maskp, int isadd)
/* Deregister or cleanup */
cleanup:
for_each_cpu_mask_nr(cpu, mask) {
for_each_cpu(cpu, mask) {
listeners = &per_cpu(listener_array, cpu);
down_write(&listeners->sem);
list_for_each_entry_safe(s, tmp, &listeners->list, list) {
@ -335,7 +334,7 @@ cleanup:
return 0;
}
static int parse(struct nlattr *na, cpumask_t *mask)
static int parse(struct nlattr *na, struct cpumask *mask)
{
char *data;
int len;
@ -428,23 +427,33 @@ err:
static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
{
int rc = 0;
int rc;
struct sk_buff *rep_skb;
struct taskstats *stats;
size_t size;
cpumask_t mask;
cpumask_var_t mask;
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], &mask);
if (rc < 0)
return rc;
if (rc == 0)
return add_del_listener(info->snd_pid, &mask, REGISTER);
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], &mask);
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], mask);
if (rc < 0)
goto free_return_rc;
if (rc == 0) {
rc = add_del_listener(info->snd_pid, mask, REGISTER);
goto free_return_rc;
}
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], mask);
if (rc < 0)
goto free_return_rc;
if (rc == 0) {
rc = add_del_listener(info->snd_pid, mask, DEREGISTER);
free_return_rc:
free_cpumask_var(mask);
return rc;
if (rc == 0)
return add_del_listener(info->snd_pid, &mask, DEREGISTER);
}
free_cpumask_var(mask);
/*
* Size includes space for nested attributes

9
kernel/time/clocksource.c
View file

@ -145,10 +145,11 @@ static void clocksource_watchdog(unsigned long data)
* Cycle through CPUs to check if the CPUs stay
* synchronized to each other.
*/
int next_cpu = next_cpu_nr(raw_smp_processor_id(), cpu_online_map);
int next_cpu = cpumask_next(raw_smp_processor_id(),
cpu_online_mask);
if (next_cpu >= nr_cpu_ids)
next_cpu = first_cpu(cpu_online_map);
next_cpu = cpumask_first(cpu_online_mask);
watchdog_timer.expires += WATCHDOG_INTERVAL;
add_timer_on(&watchdog_timer, next_cpu);
}
@ -173,7 +174,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
watchdog_last = watchdog->read();
watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
add_timer_on(&watchdog_timer,
first_cpu(cpu_online_map));
cpumask_first(cpu_online_mask));
}
} else {
if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
@ -195,7 +196,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
watchdog_timer.expires =
jiffies + WATCHDOG_INTERVAL;
add_timer_on(&watchdog_timer,
first_cpu(cpu_online_map));
cpumask_first(cpu_online_mask));
}
}
}

113
kernel/time/tick-broadcast.c
View file

@ -28,7 +28,9 @@
*/
struct tick_device tick_broadcast_device;
static cpumask_t tick_broadcast_mask;
/* FIXME: Use cpumask_var_t. */
static DECLARE_BITMAP(tick_broadcast_mask, NR_CPUS);
static DECLARE_BITMAP(tmpmask, NR_CPUS);
static DEFINE_SPINLOCK(tick_broadcast_lock);
static int tick_broadcast_force;
@ -46,9 +48,9 @@ struct tick_device *tick_get_broadcast_device(void)
return &tick_broadcast_device;
}
cpumask_t *tick_get_broadcast_mask(void)
struct cpumask *tick_get_broadcast_mask(void)
{
return &tick_broadcast_mask;
return to_cpumask(tick_broadcast_mask);
}
/*
@ -72,7 +74,7 @@ int tick_check_broadcast_device(struct clock_event_device *dev)
clockevents_exchange_device(NULL, dev);
tick_broadcast_device.evtdev = dev;
if (!cpus_empty(tick_broadcast_mask))
if (!cpumask_empty(tick_get_broadcast_mask()))
tick_broadcast_start_periodic(dev);
return 1;
}
@ -104,7 +106,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
*/
if (!tick_device_is_functional(dev)) {
dev->event_handler = tick_handle_periodic;
cpu_set(cpu, tick_broadcast_mask);
cpumask_set_cpu(cpu, tick_get_broadcast_mask());
tick_broadcast_start_periodic(tick_broadcast_device.evtdev);
ret = 1;
} else {
@ -116,7 +118,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
if (!(dev->features & CLOCK_EVT_FEAT_C3STOP)) {
int cpu = smp_processor_id();
cpu_clear(cpu, tick_broadcast_mask);
cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
tick_broadcast_clear_oneshot(cpu);
}
}
@ -125,9 +127,9 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
}
/*
* Broadcast the event to the cpus, which are set in the mask
* Broadcast the event to the cpus, which are set in the mask (mangled).
*/
static void tick_do_broadcast(cpumask_t mask)
static void tick_do_broadcast(struct cpumask *mask)
{
int cpu = smp_processor_id();
struct tick_device *td;
@ -135,22 +137,21 @@ static void tick_do_broadcast(cpumask_t mask)
/*
* Check, if the current cpu is in the mask
*/
if (cpu_isset(cpu, mask)) {
cpu_clear(cpu, mask);
if (cpumask_test_cpu(cpu, mask)) {
cpumask_clear_cpu(cpu, mask);
td = &per_cpu(tick_cpu_device, cpu);
td->evtdev->event_handler(td->evtdev);
}
if (!cpus_empty(mask)) {
if (!cpumask_empty(mask)) {
/*
* It might be necessary to actually check whether the devices
* have different broadcast functions. For now, just use the
* one of the first device. This works as long as we have this
* misfeature only on x86 (lapic)
*/
cpu = first_cpu(mask);
td = &per_cpu(tick_cpu_device, cpu);
td->evtdev->broadcast(&mask);
td = &per_cpu(tick_cpu_device, cpumask_first(mask));
td->evtdev->broadcast(mask);
}
}
@ -160,12 +161,11 @@ static void tick_do_broadcast(cpumask_t mask)
*/
static void tick_do_periodic_broadcast(void)
{
cpumask_t mask;
spin_lock(&tick_broadcast_lock);
cpus_and(mask, cpu_online_map, tick_broadcast_mask);
tick_do_broadcast(mask);
cpumask_and(to_cpumask(tmpmask),
cpu_online_mask, tick_get_broadcast_mask());
tick_do_broadcast(to_cpumask(tmpmask));
spin_unlock(&tick_broadcast_lock);
}
@ -228,13 +228,13 @@ static void tick_do_broadcast_on_off(void *why)
if (!tick_device_is_functional(dev))
goto out;
bc_stopped = cpus_empty(tick_broadcast_mask);
bc_stopped = cpumask_empty(tick_get_broadcast_mask());
switch (*reason) {
case CLOCK_EVT_NOTIFY_BROADCAST_ON:
case CLOCK_EVT_NOTIFY_BROADCAST_FORCE:
if (!cpu_isset(cpu, tick_broadcast_mask)) {
cpu_set(cpu, tick_broadcast_mask);
if (!cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
cpumask_set_cpu(cpu, tick_get_broadcast_mask());
if (tick_broadcast_device.mode ==
TICKDEV_MODE_PERIODIC)
clockevents_shutdown(dev);
@ -244,8 +244,8 @@ static void tick_do_broadcast_on_off(void *why)
break;
case CLOCK_EVT_NOTIFY_BROADCAST_OFF:
if (!tick_broadcast_force &&
cpu_isset(cpu, tick_broadcast_mask)) {
cpu_clear(cpu, tick_broadcast_mask);
cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
if (tick_broadcast_device.mode ==
TICKDEV_MODE_PERIODIC)
tick_setup_periodic(dev, 0);
@ -253,7 +253,7 @@ static void tick_do_broadcast_on_off(void *why)
break;
}
if (cpus_empty(tick_broadcast_mask)) {
if (cpumask_empty(tick_get_broadcast_mask())) {
if (!bc_stopped)
clockevents_shutdown(bc);
} else if (bc_stopped) {
@ -272,7 +272,7 @@ out:
*/
void tick_broadcast_on_off(unsigned long reason, int *oncpu)
{
if (!cpu_isset(*oncpu, cpu_online_map))
if (!cpumask_test_cpu(*oncpu, cpu_online_mask))
printk(KERN_ERR "tick-broadcast: ignoring broadcast for "
"offline CPU #%d\n", *oncpu);
else
@ -303,10 +303,10 @@ void tick_shutdown_broadcast(unsigned int *cpup)
spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
cpu_clear(cpu, tick_broadcast_mask);
cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC) {
if (bc && cpus_empty(tick_broadcast_mask))
if (bc && cpumask_empty(tick_get_broadcast_mask()))
clockevents_shutdown(bc);
}
@ -342,10 +342,10 @@ int tick_resume_broadcast(void)
switch (tick_broadcast_device.mode) {
case TICKDEV_MODE_PERIODIC:
if(!cpus_empty(tick_broadcast_mask))
if (!cpumask_empty(tick_get_broadcast_mask()))
tick_broadcast_start_periodic(bc);
broadcast = cpu_isset(smp_processor_id(),
tick_broadcast_mask);
broadcast = cpumask_test_cpu(smp_processor_id(),
tick_get_broadcast_mask());
break;
case TICKDEV_MODE_ONESHOT:
broadcast = tick_resume_broadcast_oneshot(bc);
@ -360,14 +360,15 @@ int tick_resume_broadcast(void)
#ifdef CONFIG_TICK_ONESHOT
static cpumask_t tick_broadcast_oneshot_mask;
/* FIXME: use cpumask_var_t. */
static DECLARE_BITMAP(tick_broadcast_oneshot_mask, NR_CPUS);
/*
* Debugging: see timer_list.c
* Exposed for debugging: see timer_list.c
*/
cpumask_t *tick_get_broadcast_oneshot_mask(void)
struct cpumask *tick_get_broadcast_oneshot_mask(void)
{
return &tick_broadcast_oneshot_mask;
return to_cpumask(tick_broadcast_oneshot_mask);
}
static int tick_broadcast_set_event(ktime_t expires, int force)
@ -389,7 +390,7 @@ int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
*/
void tick_check_oneshot_broadcast(int cpu)
{
if (cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
if (cpumask_test_cpu(cpu, to_cpumask(tick_broadcast_oneshot_mask))) {
struct tick_device *td = &per_cpu(tick_cpu_device, cpu);
clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_ONESHOT);
@ -402,7 +403,6 @@ void tick_check_oneshot_broadcast(int cpu)
static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
{
struct tick_device *td;
cpumask_t mask;
ktime_t now, next_event;
int cpu;
@ -410,13 +410,13 @@ static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
again:
dev->next_event.tv64 = KTIME_MAX;
next_event.tv64 = KTIME_MAX;
mask = CPU_MASK_NONE;
cpumask_clear(to_cpumask(tmpmask));
now = ktime_get();
/* Find all expired events */
for_each_cpu_mask_nr(cpu, tick_broadcast_oneshot_mask) {
for_each_cpu(cpu, tick_get_broadcast_oneshot_mask()) {
td = &per_cpu(tick_cpu_device, cpu);
if (td->evtdev->next_event.tv64 <= now.tv64)
cpu_set(cpu, mask);
cpumask_set_cpu(cpu, to_cpumask(tmpmask));
else if (td->evtdev->next_event.tv64 < next_event.tv64)
next_event.tv64 = td->evtdev->next_event.tv64;
}
@ -424,7 +424,7 @@ again:
/*
* Wakeup the cpus which have an expired event.
*/
tick_do_broadcast(mask);
tick_do_broadcast(to_cpumask(tmpmask));
/*
* Two reasons for reprogram:
@ -476,15 +476,16 @@ void tick_broadcast_oneshot_control(unsigned long reason)
goto out;
if (reason == CLOCK_EVT_NOTIFY_BROADCAST_ENTER) {
if (!cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
cpu_set(cpu, tick_broadcast_oneshot_mask);
if (!cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
cpumask_set_cpu(cpu, tick_get_broadcast_oneshot_mask());
clockevents_set_mode(dev, CLOCK_EVT_MODE_SHUTDOWN);
if (dev->next_event.tv64 < bc->next_event.tv64)
tick_broadcast_set_event(dev->next_event, 1);
}
} else {
if (cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
cpu_clear(cpu, tick_broadcast_oneshot_mask);
if (cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
cpumask_clear_cpu(cpu,
tick_get_broadcast_oneshot_mask());
clockevents_set_mode(dev, CLOCK_EVT_MODE_ONESHOT);
if (dev->next_event.tv64 != KTIME_MAX)
tick_program_event(dev->next_event, 1);
@ -502,15 +503,16 @@ out:
*/
static void tick_broadcast_clear_oneshot(int cpu)
{
cpu_clear(cpu, tick_broadcast_oneshot_mask);
cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
}
static void tick_broadcast_init_next_event(cpumask_t *mask, ktime_t expires)
static void tick_broadcast_init_next_event(struct cpumask *mask,
ktime_t expires)
{
struct tick_device *td;
int cpu;
for_each_cpu_mask_nr(cpu, *mask) {
for_each_cpu(cpu, mask) {
td = &per_cpu(tick_cpu_device, cpu);
if (td->evtdev)
td->evtdev->next_event = expires;
@ -526,7 +528,6 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
if (bc->event_handler != tick_handle_oneshot_broadcast) {
int was_periodic = bc->mode == CLOCK_EVT_MODE_PERIODIC;
int cpu = smp_processor_id();
cpumask_t mask;
bc->event_handler = tick_handle_oneshot_broadcast;
clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
@ -540,13 +541,15 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
* oneshot_mask bits for those and program the
* broadcast device to fire.
*/
mask = tick_broadcast_mask;
cpu_clear(cpu, mask);
cpus_or(tick_broadcast_oneshot_mask,
tick_broadcast_oneshot_mask, mask);
cpumask_copy(to_cpumask(tmpmask), tick_get_broadcast_mask());
cpumask_clear_cpu(cpu, to_cpumask(tmpmask));
cpumask_or(tick_get_broadcast_oneshot_mask(),
tick_get_broadcast_oneshot_mask(),
to_cpumask(tmpmask));
if (was_periodic && !cpus_empty(mask)) {
tick_broadcast_init_next_event(&mask, tick_next_period);
if (was_periodic && !cpumask_empty(to_cpumask(tmpmask))) {
tick_broadcast_init_next_event(to_cpumask(tmpmask),
tick_next_period);
tick_broadcast_set_event(tick_next_period, 1);
} else
bc->next_event.tv64 = KTIME_MAX;
@ -585,7 +588,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
* Clear the broadcast mask flag for the dead cpu, but do not
* stop the broadcast device!
*/
cpu_clear(cpu, tick_broadcast_oneshot_mask);
cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}

6
kernel/time/tick-common.c
View file

@ -254,7 +254,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
curdev = NULL;
}
clockevents_exchange_device(curdev, newdev);
tick_setup_device(td, newdev, cpu, &cpumask_of_cpu(cpu));
tick_setup_device(td, newdev, cpu, cpumask_of(cpu));
if (newdev->features & CLOCK_EVT_FEAT_ONESHOT)
tick_oneshot_notify();
@ -299,9 +299,9 @@ static void tick_shutdown(unsigned int *cpup)
}
/* Transfer the do_timer job away from this cpu */
if (*cpup == tick_do_timer_cpu) {
int cpu = first_cpu(cpu_online_map);
int cpu = cpumask_first(cpu_online_mask);
tick_do_timer_cpu = (cpu != NR_CPUS) ? cpu :
tick_do_timer_cpu = (cpu < nr_cpu_ids) ? cpu :
TICK_DO_TIMER_NONE;
}
spin_unlock_irqrestore(&tick_device_lock, flags);

42
kernel/trace/ring_buffer.c
View file

@ -195,7 +195,7 @@ void *ring_buffer_event_data(struct ring_buffer_event *event)
EXPORT_SYMBOL_GPL(ring_buffer_event_data);
#define for_each_buffer_cpu(buffer, cpu) \
for_each_cpu_mask(cpu, buffer->cpumask)
for_each_cpu(cpu, buffer->cpumask)
#define TS_SHIFT 27
#define TS_MASK ((1ULL << TS_SHIFT) - 1)
@ -267,7 +267,7 @@ struct ring_buffer {
unsigned pages;
unsigned flags;
int cpus;
cpumask_t cpumask;
cpumask_var_t cpumask;
atomic_t record_disabled;
struct mutex mutex;
@ -458,6 +458,9 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
if (!buffer)
return NULL;
if (!alloc_cpumask_var(&buffer->cpumask, GFP_KERNEL))
goto fail_free_buffer;
buffer->pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
buffer->flags = flags;
@ -465,14 +468,14 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
if (buffer->pages == 1)
buffer->pages++;
buffer->cpumask = cpu_possible_map;
cpumask_copy(buffer->cpumask, cpu_possible_mask);
buffer->cpus = nr_cpu_ids;
bsize = sizeof(void *) * nr_cpu_ids;
buffer->buffers = kzalloc(ALIGN(bsize, cache_line_size()),
GFP_KERNEL);
if (!buffer->buffers)
goto fail_free_buffer;
goto fail_free_cpumask;
for_each_buffer_cpu(buffer, cpu) {
buffer->buffers[cpu] =
@ -492,6 +495,9 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
}
kfree(buffer->buffers);
fail_free_cpumask:
free_cpumask_var(buffer->cpumask);
fail_free_buffer:
kfree(buffer);
return NULL;
@ -510,6 +516,8 @@ ring_buffer_free(struct ring_buffer *buffer)
for_each_buffer_cpu(buffer, cpu)
rb_free_cpu_buffer(buffer->buffers[cpu]);
free_cpumask_var(buffer->cpumask);
kfree(buffer);
}
EXPORT_SYMBOL_GPL(ring_buffer_free);
@ -1283,7 +1291,7 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer,
cpu = raw_smp_processor_id();
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
goto out;
cpu_buffer = buffer->buffers[cpu];
@ -1396,7 +1404,7 @@ int ring_buffer_write(struct ring_buffer *buffer,
cpu = raw_smp_processor_id();
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
goto out;
cpu_buffer = buffer->buffers[cpu];
@ -1478,7 +1486,7 @@ void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return;
cpu_buffer = buffer->buffers[cpu];
@ -1498,7 +1506,7 @@ void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return;
cpu_buffer = buffer->buffers[cpu];
@ -1515,7 +1523,7 @@ unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return 0;
cpu_buffer = buffer->buffers[cpu];
@ -1532,7 +1540,7 @@ unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return 0;
cpu_buffer = buffer->buffers[cpu];
@ -1850,7 +1858,7 @@ rb_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
struct buffer_page *reader;
int nr_loops = 0;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return NULL;
cpu_buffer = buffer->buffers[cpu];
@ -2025,7 +2033,7 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
struct ring_buffer_event *event;
unsigned long flags;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return NULL;
spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
@ -2062,7 +2070,7 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
struct ring_buffer_iter *iter;
unsigned long flags;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return NULL;
iter = kmalloc(sizeof(*iter), GFP_KERNEL);
@ -2172,7 +2180,7 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu];
unsigned long flags;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return;
spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
@ -2228,7 +2236,7 @@ int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
if (!cpu_isset(cpu, buffer->cpumask))
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return 1;
cpu_buffer = buffer->buffers[cpu];
@ -2252,8 +2260,8 @@ int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
struct ring_buffer_per_cpu *cpu_buffer_a;
struct ring_buffer_per_cpu *cpu_buffer_b;
if (!cpu_isset(cpu, buffer_a->cpumask) ||
!cpu_isset(cpu, buffer_b->cpumask))
if (!cpumask_test_cpu(cpu, buffer_a->cpumask) ||
!cpumask_test_cpu(cpu, buffer_b->cpumask))
return -EINVAL;
/* At least make sure the two buffers are somewhat the same */

72
kernel/trace/trace.c
View file

@ -89,10 +89,10 @@ static inline void ftrace_enable_cpu(void)
preempt_enable();
}
static cpumask_t __read_mostly tracing_buffer_mask;
static cpumask_var_t __read_mostly tracing_buffer_mask;
#define for_each_tracing_cpu(cpu) \
for_each_cpu_mask(cpu, tracing_buffer_mask)
for_each_cpu(cpu, tracing_buffer_mask)
/*
* ftrace_dump_on_oops - variable to dump ftrace buffer on oops
@ -1811,10 +1811,10 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
return;
if (cpu_isset(iter->cpu, iter->started))
if (cpumask_test_cpu(iter->cpu, iter->started))
return;
cpu_set(iter->cpu, iter->started);
cpumask_set_cpu(iter->cpu, iter->started);
trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);
}
@ -2646,13 +2646,7 @@ static struct file_operations show_traces_fops = {
/*
* Only trace on a CPU if the bitmask is set:
*/
static cpumask_t tracing_cpumask = CPU_MASK_ALL;
/*
* When tracing/tracing_cpu_mask is modified then this holds
* the new bitmask we are about to install:
*/
static cpumask_t tracing_cpumask_new;
static cpumask_var_t tracing_cpumask;
/*
* The tracer itself will not take this lock, but still we want
@ -2674,7 +2668,7 @@ tracing_cpumask_read(struct file *filp, char __user *ubuf,
mutex_lock(&tracing_cpumask_update_lock);
len = cpumask_scnprintf(mask_str, count, &tracing_cpumask);
len = cpumask_scnprintf(mask_str, count, tracing_cpumask);
if (count - len < 2) {
count = -EINVAL;
goto out_err;
@ -2693,9 +2687,13 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
size_t count, loff_t *ppos)
{
int err, cpu;
cpumask_var_t tracing_cpumask_new;
if (!alloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL))
return -ENOMEM;
mutex_lock(&tracing_cpumask_update_lock);
err = cpumask_parse_user(ubuf, count, &tracing_cpumask_new);
err = cpumask_parse_user(ubuf, count, tracing_cpumask_new);
if (err)
goto err_unlock;
@ -2706,26 +2704,28 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
* Increase/decrease the disabled counter if we are
* about to flip a bit in the cpumask:
*/
if (cpu_isset(cpu, tracing_cpumask) &&
!cpu_isset(cpu, tracing_cpumask_new)) {
if (cpumask_test_cpu(cpu, tracing_cpumask) &&
!cpumask_test_cpu(cpu, tracing_cpumask_new)) {
atomic_inc(&global_trace.data[cpu]->disabled);
}
if (!cpu_isset(cpu, tracing_cpumask) &&
cpu_isset(cpu, tracing_cpumask_new)) {
if (!cpumask_test_cpu(cpu, tracing_cpumask) &&
cpumask_test_cpu(cpu, tracing_cpumask_new)) {
atomic_dec(&global_trace.data[cpu]->disabled);
}
}
__raw_spin_unlock(&ftrace_max_lock);
local_irq_enable();
tracing_cpumask = tracing_cpumask_new;
cpumask_copy(tracing_cpumask, tracing_cpumask_new);
mutex_unlock(&tracing_cpumask_update_lock);
free_cpumask_var(tracing_cpumask_new);
return count;
err_unlock:
mutex_unlock(&tracing_cpumask_update_lock);
free_cpumask_var(tracing_cpumask);
return err;
}
@ -3114,10 +3114,15 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
if (!iter)
return -ENOMEM;
if (!alloc_cpumask_var(&iter->started, GFP_KERNEL)) {
kfree(iter);
return -ENOMEM;
}
mutex_lock(&trace_types_lock);
/* trace pipe does not show start of buffer */
cpus_setall(iter->started);
cpumask_setall(iter->started);
iter->tr = &global_trace;
iter->trace = current_trace;
@ -3134,6 +3139,7 @@ static int tracing_release_pipe(struct inode *inode, struct file *file)
{
struct trace_iterator *iter = file->private_data;
free_cpumask_var(iter->started);
kfree(iter);
atomic_dec(&tracing_reader);
@ -3752,7 +3758,6 @@ void ftrace_dump(void)
static DEFINE_SPINLOCK(ftrace_dump_lock);
/* use static because iter can be a bit big for the stack */
static struct trace_iterator iter;
static cpumask_t mask;
static int dump_ran;
unsigned long flags;
int cnt = 0, cpu;
@ -3786,8 +3791,6 @@ void ftrace_dump(void)
* and then release the locks again.
*/
cpus_clear(mask);
while (!trace_empty(&iter)) {
if (!cnt)
@ -3823,19 +3826,28 @@ __init static int tracer_alloc_buffers(void)
{
struct trace_array_cpu *data;
int i;
int ret = -ENOMEM;
if (!alloc_cpumask_var(&tracing_buffer_mask, GFP_KERNEL))
goto out;
if (!alloc_cpumask_var(&tracing_cpumask, GFP_KERNEL))
goto out_free_buffer_mask;
cpumask_copy(tracing_buffer_mask, cpu_possible_mask);
cpumask_copy(tracing_cpumask, cpu_all_mask);
/* TODO: make the number of buffers hot pluggable with CPUS */
tracing_buffer_mask = cpu_possible_map;
global_trace.buffer = ring_buffer_alloc(trace_buf_size,
TRACE_BUFFER_FLAGS);
if (!global_trace.buffer) {
printk(KERN_ERR "tracer: failed to allocate ring buffer!\n");
WARN_ON(1);
return 0;
goto out_free_cpumask;
}
global_trace.entries = ring_buffer_size(global_trace.buffer);
#ifdef CONFIG_TRACER_MAX_TRACE
max_tr.buffer = ring_buffer_alloc(trace_buf_size,
TRACE_BUFFER_FLAGS);
@ -3843,7 +3855,7 @@ __init static int tracer_alloc_buffers(void)
printk(KERN_ERR "tracer: failed to allocate max ring buffer!\n");
WARN_ON(1);
ring_buffer_free(global_trace.buffer);
return 0;
goto out_free_cpumask;
}
max_tr.entries = ring_buffer_size(max_tr.buffer);
WARN_ON(max_tr.entries != global_trace.entries);
@ -3873,8 +3885,14 @@ __init static int tracer_alloc_buffers(void)
&trace_panic_notifier);
register_die_notifier(&trace_die_notifier);
ret = 0;
return 0;
out_free_cpumask:
free_cpumask_var(tracing_cpumask);
out_free_buffer_mask:
free_cpumask_var(tracing_buffer_mask);
out:
return ret;
}
early_initcall(tracer_alloc_buffers);
fs_initcall(tracer_init_debugfs);

2
kernel/trace/trace.h
View file

@ -368,7 +368,7 @@ struct trace_iterator {
loff_t pos;
long idx;
cpumask_t started;
cpumask_var_t started;
};
int tracing_is_enabled(void);

2
kernel/trace/trace_boot.c
View file

@ -42,7 +42,7 @@ static int boot_trace_init(struct trace_array *tr)
int cpu;
boot_trace = tr;
for_each_cpu_mask(cpu, cpu_possible_map)
for_each_cpu(cpu, cpu_possible_mask)
tracing_reset(tr, cpu);
tracing_sched_switch_assign_trace(tr);

2
kernel/trace/trace_functions_graph.c
View file

@ -79,7 +79,7 @@ print_graph_cpu(struct trace_seq *s, int cpu)
int i;
int ret;
int log10_this = log10_cpu(cpu);
int log10_all = log10_cpu(cpus_weight_nr(cpu_online_map));
int log10_all = log10_cpu(cpumask_weight(cpu_online_mask));
/*

6
kernel/trace/trace_hw_branches.c
View file

@ -46,7 +46,7 @@ static void bts_trace_start(struct trace_array *tr)
tracing_reset_online_cpus(tr);
for_each_cpu_mask(cpu, cpu_possible_map)
for_each_cpu(cpu, cpu_possible_mask)
smp_call_function_single(cpu, bts_trace_start_cpu, NULL, 1);
}
@ -62,7 +62,7 @@ static void bts_trace_stop(struct trace_array *tr)
{
int cpu;
for_each_cpu_mask(cpu, cpu_possible_map)
for_each_cpu(cpu, cpu_possible_mask)
smp_call_function_single(cpu, bts_trace_stop_cpu, NULL, 1);
}
@ -172,7 +172,7 @@ static void trace_bts_prepare(struct trace_iterator *iter)
{
int cpu;
for_each_cpu_mask(cpu, cpu_possible_map)
for_each_cpu(cpu, cpu_possible_mask)
smp_call_function_single(cpu, trace_bts_cpu, iter->tr, 1);
}

2
kernel/trace/trace_power.c
View file

@ -39,7 +39,7 @@ static int power_trace_init(struct trace_array *tr)
trace_power_enabled = 1;
for_each_cpu_mask(cpu, cpu_possible_map)
for_each_cpu(cpu, cpu_possible_mask)
tracing_reset(tr, cpu);
return 0;
}

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