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cpumask: Use topology_core_cpumask()/topology_thread_cpumask()

Browse source 
Impact: reduce stack usage, use new cpumask API.

This actually uses topology_core_cpumask() and
topology_thread_cpumask(), removing the only users of
topology_core_siblings() and topology_thread_siblings()

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: linux-net-drivers@solarflare.com
This commit is contained in:
Rusty Russell 2009-01-10 21:58:08 -08:00 committed by Ingo Molnar
parent 7f7ace0cda
commit fbd59a8d1f
4 changed files with 27 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
Documentation/cputopology.txt
View file

@ -18,11 +18,11 @@ For an architecture to support this feature, it must define some of
these macros in include/asm-XXX/topology.h:
#define topology_physical_package_id(cpu)
#define topology_core_id(cpu)
#define topology_thread_siblings(cpu)
#define topology_core_siblings(cpu)
#define topology_thread_cpumask(cpu)
#define topology_core_cpumask(cpu)
The type of **_id is int.
The type of siblings is cpumask_t.
The type of siblings is (const) struct cpumask *.
To be consistent on all architectures, include/linux/topology.h
provides default definitions for any of the above macros that are

31
drivers/base/topology.c
View file

@ -31,6 +31,9 @@
#include <linux/hardirq.h>
#include <linux/topology.h>
#define define_one_ro_named(_name, _func) \
static SYSDEV_ATTR(_name, 0444, _func, NULL)
#define define_one_ro(_name) \
static SYSDEV_ATTR(_name, 0444, show_##_name, NULL)
@ -42,8 +45,8 @@ static ssize_t show_##name(struct sys_device *dev, \
return sprintf(buf, "%d\n", topology_##name(cpu)); \
}
#if defined(topology_thread_siblings) || defined(topology_core_siblings)
static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf)
#if defined(topology_thread_cpumask) || defined(topology_core_cpumask)
static ssize_t show_cpumap(int type, const struct cpumask *mask, char *buf)
{
ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
int n = 0;
@ -65,7 +68,7 @@ static ssize_t show_##name(struct sys_device *dev, \
struct sysdev_attribute *attr, char *buf) \
{ \
unsigned int cpu = dev->id; \
return show_cpumap(0, &(topology_##name(cpu)), buf); \
return show_cpumap(0, topology_##name(cpu), buf); \
}
#define define_siblings_show_list(name) \
@ -74,7 +77,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \
char *buf) \
{ \
unsigned int cpu = dev->id; \
return show_cpumap(1, &(topology_##name(cpu)), buf); \
return show_cpumap(1, topology_##name(cpu), buf); \
}
#else
@ -82,9 +85,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \
static ssize_t show_##name(struct sys_device *dev, \
struct sysdev_attribute *attr, char *buf) \
{ \
unsigned int cpu = dev->id; \
cpumask_t mask = topology_##name(cpu); \
return show_cpumap(0, &mask, buf); \
return show_cpumap(0, topology_##name(dev->id), buf); \
}
#define define_siblings_show_list(name) \
@ -92,9 +93,7 @@ static ssize_t show_##name##_list(struct sys_device *dev, \
struct sysdev_attribute *attr, \
char *buf) \
{ \
unsigned int cpu = dev->id; \
cpumask_t mask = topology_##name(cpu); \
return show_cpumap(1, &mask, buf); \
return show_cpumap(1, topology_##name(dev->id), buf); \
}
#endif
@ -107,13 +106,13 @@ define_one_ro(physical_package_id);
define_id_show_func(core_id);
define_one_ro(core_id);
define_siblings_show_func(thread_siblings);
define_one_ro(thread_siblings);
define_one_ro(thread_siblings_list);
define_siblings_show_func(thread_cpumask);
define_one_ro_named(thread_siblings, show_thread_cpumask);
define_one_ro_named(thread_siblings_list, show_thread_cpumask_list);
define_siblings_show_func(core_siblings);
define_one_ro(core_siblings);
define_one_ro(core_siblings_list);
define_siblings_show_func(core_cpumask);
define_one_ro_named(core_siblings, show_core_cpumask);
define_one_ro_named(core_siblings_list, show_core_cpumask_list);
static struct attribute *default_attrs[] = {
&attr_physical_package_id.attr,

4
drivers/net/sfc/efx.c
View file

@ -863,8 +863,8 @@ static int efx_wanted_rx_queues(void)
for_each_online_cpu(cpu) {
if (!cpu_isset(cpu, core_mask)) {
++count;
cpus_or(core_mask, core_mask,
topology_core_siblings(cpu));
cpumask_or(&core_mask, &core_mask,
topology_core_cpumask(cpu));
}
}

6
include/linux/topology.h
View file

@ -193,5 +193,11 @@ int arch_update_cpu_topology(void);
#ifndef topology_core_siblings
#define topology_core_siblings(cpu) cpumask_of_cpu(cpu)
#endif
#ifndef topology_thread_cpumask
#define topology_thread_cpumask(cpu) cpumask_of(cpu)
#endif
#ifndef topology_core_cpumask
#define topology_core_cpumask(cpu) cpumask_of(cpu)
#endif
#endif /* _LINUX_TOPOLOGY_H */