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cpumask: Move deprecated functions to end of header.
The new ones have pretty kerneldoc. Move the old ones to the end to avoid confusing people. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: benh@kernel.crashing.org
This commit is contained in:
Rusty Russell
parent
4b805b1738
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1 changed files with 252 additions and 341 deletions
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@ -3,328 +3,37 @@
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/*
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/*
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* Cpumasks provide a bitmap suitable for representing the
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* Cpumasks provide a bitmap suitable for representing the
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* set of CPU's in a system, one bit position per CPU number.
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* set of CPU's in a system, one bit position per CPU number. In general,
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*
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* only nr_cpu_ids (<= NR_CPUS) bits are valid.
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* The new cpumask_ ops take a "struct cpumask *"; the old ones
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* use cpumask_t.
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*
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* See detailed comments in the file linux/bitmap.h describing the
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* data type on which these cpumasks are based.
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*
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* For details of cpumask_scnprintf() and cpumask_parse_user(),
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* see bitmap_scnprintf() and bitmap_parse_user() in lib/bitmap.c.
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* For details of cpulist_scnprintf() and cpulist_parse(), see
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* bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
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*
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* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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* Note: The alternate operations with the suffix "_nr" are used
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* to limit the range of the loop to nr_cpu_ids instead of
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* NR_CPUS when NR_CPUS > 64 for performance reasons.
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* If NR_CPUS is <= 64 then most assembler bitmask
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* operators execute faster with a constant range, so
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* the operator will continue to use NR_CPUS.
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*
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* Another consideration is that nr_cpu_ids is initialized
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* to NR_CPUS and isn't lowered until the possible cpus are
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* discovered (including any disabled cpus). So early uses
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* will span the entire range of NR_CPUS.
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* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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*
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* The obsolescent cpumask operations are:
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*
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* void cpu_set(cpu, mask) turn on bit 'cpu' in mask
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* void cpu_clear(cpu, mask) turn off bit 'cpu' in mask
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* void cpus_setall(mask) set all bits
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* void cpus_clear(mask) clear all bits
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* int cpu_isset(cpu, mask) true iff bit 'cpu' set in mask
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* int cpu_test_and_set(cpu, mask) test and set bit 'cpu' in mask
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*
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* int cpus_and(dst, src1, src2) dst = src1 & src2 [intersection]
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* void cpus_or(dst, src1, src2) dst = src1 | src2 [union]
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* void cpus_xor(dst, src1, src2) dst = src1 ^ src2
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* int cpus_andnot(dst, src1, src2) dst = src1 & ~src2
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*
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* int cpus_equal(mask1, mask2) Does mask1 == mask2?
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* int cpus_intersects(mask1, mask2) Do mask1 and mask2 intersect?
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* int cpus_subset(mask1, mask2) Is mask1 a subset of mask2?
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* int cpus_empty(mask) Is mask empty (no bits sets)?
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* int cpus_weight(mask) Hamming weigh - number of set bits
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*
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* void cpus_shift_left(dst, src, n) Shift left
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*
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* int first_cpu(mask) Number lowest set bit, or NR_CPUS
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* int next_cpu(cpu, mask) Next cpu past 'cpu', or NR_CPUS
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*
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* cpumask_t cpumask_of_cpu(cpu) Return cpumask with bit 'cpu' set
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* (can be used as an lvalue)
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* CPU_MASK_ALL Initializer - all bits set
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* CPU_MASK_NONE Initializer - no bits set
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* unsigned long *cpus_addr(mask) Array of unsigned long's in mask
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*
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* int cpumask_scnprintf(buf, len, mask) Format cpumask for printing
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* int cpumask_parse_user(ubuf, ulen, mask) Parse ascii string as cpumask
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* int cpulist_scnprintf(buf, len, mask) Format cpumask as list for printing
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* int cpulist_parse(buf, map) Parse ascii string as cpulist
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*
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* for_each_cpu_mask(cpu, mask) for-loop cpu over mask using NR_CPUS
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* for_each_cpu_mask_nr(cpu, mask) for-loop cpu over mask using nr_cpu_ids
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*
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* int num_online_cpus() Number of online CPUs
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* int num_possible_cpus() Number of all possible CPUs
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* int num_present_cpus() Number of present CPUs
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*
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* int cpu_online(cpu) Is some cpu online?
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* int cpu_possible(cpu) Is some cpu possible?
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* int cpu_present(cpu) Is some cpu present (can schedule)?
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*
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* int any_online_cpu(mask) First online cpu in mask
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*
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* for_each_possible_cpu(cpu) for-loop cpu over cpu_possible_map
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* for_each_online_cpu(cpu) for-loop cpu over cpu_online_map
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* for_each_present_cpu(cpu) for-loop cpu over cpu_present_map
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*
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* Subtlety:
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* 1) The 'type-checked' form of cpu_isset() causes gcc (3.3.2, anyway)
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* to generate slightly worse code. Note for example the additional
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* 40 lines of assembly code compiling the "for each possible cpu"
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* loops buried in the disk_stat_read() macros calls when compiling
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* drivers/block/genhd.c (arch i386, CONFIG_SMP=y). So use a simple
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* one-line #define for cpu_isset(), instead of wrapping an inline
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* inside a macro, the way we do the other calls.
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*/
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*/
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/threads.h>
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#include <linux/threads.h>
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#include <linux/bitmap.h>
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#include <linux/bitmap.h>
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typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
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typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
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#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
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#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
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static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
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{
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set_bit(cpu, dstp->bits);
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}
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#define cpu_clear(cpu, dst) __cpu_clear((cpu), &(dst))
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static inline void __cpu_clear(int cpu, volatile cpumask_t *dstp)
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{
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clear_bit(cpu, dstp->bits);
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}
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#define cpus_setall(dst) __cpus_setall(&(dst), NR_CPUS)
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static inline void __cpus_setall(cpumask_t *dstp, int nbits)
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{
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bitmap_fill(dstp->bits, nbits);
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}
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#define cpus_clear(dst) __cpus_clear(&(dst), NR_CPUS)
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static inline void __cpus_clear(cpumask_t *dstp, int nbits)
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{
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bitmap_zero(dstp->bits, nbits);
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}
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/* No static inline type checking - see Subtlety (1) above. */
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#define cpu_isset(cpu, cpumask) test_bit((cpu), (cpumask).bits)
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#define cpu_test_and_set(cpu, cpumask) __cpu_test_and_set((cpu), &(cpumask))
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static inline int __cpu_test_and_set(int cpu, cpumask_t *addr)
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{
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return test_and_set_bit(cpu, addr->bits);
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}
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#define cpus_and(dst, src1, src2) __cpus_and(&(dst), &(src1), &(src2), NR_CPUS)
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static inline int __cpus_and(cpumask_t *dstp, const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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return bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
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}
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#define cpus_or(dst, src1, src2) __cpus_or(&(dst), &(src1), &(src2), NR_CPUS)
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static inline void __cpus_or(cpumask_t *dstp, const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
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}
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#define cpus_xor(dst, src1, src2) __cpus_xor(&(dst), &(src1), &(src2), NR_CPUS)
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static inline void __cpus_xor(cpumask_t *dstp, const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
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}
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#define cpus_andnot(dst, src1, src2) \
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__cpus_andnot(&(dst), &(src1), &(src2), NR_CPUS)
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static inline int __cpus_andnot(cpumask_t *dstp, const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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return bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
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}
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#define cpus_equal(src1, src2) __cpus_equal(&(src1), &(src2), NR_CPUS)
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static inline int __cpus_equal(const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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return bitmap_equal(src1p->bits, src2p->bits, nbits);
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}
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#define cpus_intersects(src1, src2) __cpus_intersects(&(src1), &(src2), NR_CPUS)
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static inline int __cpus_intersects(const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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return bitmap_intersects(src1p->bits, src2p->bits, nbits);
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}
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#define cpus_subset(src1, src2) __cpus_subset(&(src1), &(src2), NR_CPUS)
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static inline int __cpus_subset(const cpumask_t *src1p,
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const cpumask_t *src2p, int nbits)
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{
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return bitmap_subset(src1p->bits, src2p->bits, nbits);
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}
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#define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
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static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
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{
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return bitmap_empty(srcp->bits, nbits);
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}
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#define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
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static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
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{
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return bitmap_weight(srcp->bits, nbits);
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}
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#define cpus_shift_left(dst, src, n) \
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__cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
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static inline void __cpus_shift_left(cpumask_t *dstp,
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const cpumask_t *srcp, int n, int nbits)
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{
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bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
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}
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#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
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/**
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/**
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* to_cpumask - convert an NR_CPUS bitmap to a struct cpumask *
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* cpumask_bits - get the bits in a cpumask
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* @bitmap: the bitmap
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* @maskp: the struct cpumask *
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*
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*
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* There are a few places where cpumask_var_t isn't appropriate and
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* You should only assume nr_cpu_ids bits of this mask are valid. This is
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* static cpumasks must be used (eg. very early boot), yet we don't
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* a macro so it's const-correct.
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* expose the definition of 'struct cpumask'.
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*
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* This does the conversion, and can be used as a constant initializer.
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*/
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*/
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#define to_cpumask(bitmap) \
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#define cpumask_bits(maskp) ((maskp)->bits)
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((struct cpumask *)(1 ? (bitmap) \
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: (void *)sizeof(__check_is_bitmap(bitmap))))
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static inline int __check_is_bitmap(const unsigned long *bitmap)
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{
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return 1;
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}
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/*
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* Special-case data structure for "single bit set only" constant CPU masks.
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*
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* We pre-generate all the 64 (or 32) possible bit positions, with enough
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* padding to the left and the right, and return the constant pointer
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* appropriately offset.
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*/
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extern const unsigned long
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cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
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static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
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{
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const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
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p -= cpu / BITS_PER_LONG;
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return to_cpumask(p);
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}
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#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
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/*
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* In cases where we take the address of the cpumask immediately,
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* gcc optimizes it out (it's a constant) and there's no huge stack
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* variable created:
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*/
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#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
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#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)
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#if NR_CPUS <= BITS_PER_LONG
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#define CPU_MASK_ALL \
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(cpumask_t) { { \
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[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
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} }
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#else
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#define CPU_MASK_ALL \
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(cpumask_t) { { \
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[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
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[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
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} }
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#endif
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#define CPU_MASK_NONE \
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(cpumask_t) { { \
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[0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
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} }
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#define CPU_MASK_CPU0 \
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(cpumask_t) { { \
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[0] = 1UL \
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} }
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#define cpus_addr(src) ((src).bits)
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#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
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#if NR_CPUS == 1
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#if NR_CPUS == 1
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#define nr_cpu_ids 1
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#define nr_cpu_ids 1
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#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
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#else
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#define first_cpu(src) ({ (void)(src); 0; })
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#define next_cpu(n, src) ({ (void)(src); 1; })
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#define any_online_cpu(mask) 0
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#define for_each_cpu_mask(cpu, mask) \
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for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
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#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
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#else /* NR_CPUS > 1 */
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extern int nr_cpu_ids;
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extern int nr_cpu_ids;
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#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
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int __first_cpu(const cpumask_t *srcp);
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int __next_cpu(int n, const cpumask_t *srcp);
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int __any_online_cpu(const cpumask_t *mask);
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#define first_cpu(src) __first_cpu(&(src))
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#define next_cpu(n, src) __next_cpu((n), &(src))
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#define any_online_cpu(mask) __any_online_cpu(&(mask))
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#define for_each_cpu_mask(cpu, mask) \
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for ((cpu) = -1; \
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(cpu) = next_cpu((cpu), (mask)), \
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(cpu) < NR_CPUS; )
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#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
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#endif
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#endif
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#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
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#ifdef CONFIG_CPUMASK_OFFSTACK
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#if NR_CPUS <= 64
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/* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also,
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* not all bits may be allocated. */
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#define for_each_cpu_mask_nr(cpu, mask) for_each_cpu_mask(cpu, mask)
|
#define nr_cpumask_bits nr_cpu_ids
|
||||||
|
#else
|
||||||
#else /* NR_CPUS > 64 */
|
#define nr_cpumask_bits NR_CPUS
|
||||||
|
#endif
|
||||||
int __next_cpu_nr(int n, const cpumask_t *srcp);
|
|
||||||
#define for_each_cpu_mask_nr(cpu, mask) \
|
|
||||||
for ((cpu) = -1; \
|
|
||||||
(cpu) = __next_cpu_nr((cpu), &(mask)), \
|
|
||||||
(cpu) < nr_cpu_ids; )
|
|
||||||
|
|
||||||
#endif /* NR_CPUS > 64 */
|
|
||||||
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* The following particular system cpumasks and operations manage
|
* The following particular system cpumasks and operations manage
|
||||||
|
|
@ -371,12 +80,6 @@ extern const struct cpumask *const cpu_online_mask;
|
||||||
extern const struct cpumask *const cpu_present_mask;
|
extern const struct cpumask *const cpu_present_mask;
|
||||||
extern const struct cpumask *const cpu_active_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
|
#if NR_CPUS > 1
|
||||||
#define num_online_cpus() cpumask_weight(cpu_online_mask)
|
#define num_online_cpus() cpumask_weight(cpu_online_mask)
|
||||||
#define num_possible_cpus() cpumask_weight(cpu_possible_mask)
|
#define num_possible_cpus() cpumask_weight(cpu_possible_mask)
|
||||||
|
|
@ -395,35 +98,6 @@ extern const struct cpumask *const cpu_active_mask;
|
||||||
#define cpu_active(cpu) ((cpu) == 0)
|
#define cpu_active(cpu) ((cpu) == 0)
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
|
|
||||||
|
|
||||||
/* 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)
|
|
||||||
|
|
||||||
#if NR_CPUS <= BITS_PER_LONG
|
|
||||||
#define CPU_BITS_ALL \
|
|
||||||
{ \
|
|
||||||
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
|
||||||
}
|
|
||||||
|
|
||||||
#else /* NR_CPUS > BITS_PER_LONG */
|
|
||||||
|
|
||||||
#define CPU_BITS_ALL \
|
|
||||||
{ \
|
|
||||||
[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
|
|
||||||
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
|
||||||
}
|
|
||||||
#endif /* NR_CPUS > BITS_PER_LONG */
|
|
||||||
|
|
||||||
#ifdef CONFIG_CPUMASK_OFFSTACK
|
|
||||||
/* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also,
|
|
||||||
* not all bits may be allocated. */
|
|
||||||
#define nr_cpumask_bits nr_cpu_ids
|
|
||||||
#else
|
|
||||||
#define nr_cpumask_bits NR_CPUS
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* verify cpu argument to cpumask_* operators */
|
/* verify cpu argument to cpumask_* operators */
|
||||||
static inline unsigned int cpumask_check(unsigned int cpu)
|
static inline unsigned int cpumask_check(unsigned int cpu)
|
||||||
{
|
{
|
||||||
|
|
@ -984,4 +658,241 @@ void set_cpu_active(unsigned int cpu, bool active);
|
||||||
void init_cpu_present(const struct cpumask *src);
|
void init_cpu_present(const struct cpumask *src);
|
||||||
void init_cpu_possible(const struct cpumask *src);
|
void init_cpu_possible(const struct cpumask *src);
|
||||||
void init_cpu_online(const struct cpumask *src);
|
void init_cpu_online(const struct cpumask *src);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* 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.
|
||||||
|
*
|
||||||
|
* We pre-generate all the 64 (or 32) possible bit positions, with enough
|
||||||
|
* padding to the left and the right, and return the constant pointer
|
||||||
|
* appropriately offset.
|
||||||
|
*/
|
||||||
|
extern const unsigned long
|
||||||
|
cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
|
||||||
|
|
||||||
|
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 to_cpumask(p);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
|
||||||
|
|
||||||
|
#if NR_CPUS <= BITS_PER_LONG
|
||||||
|
#define CPU_BITS_ALL \
|
||||||
|
{ \
|
||||||
|
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
||||||
|
}
|
||||||
|
|
||||||
|
#else /* NR_CPUS > BITS_PER_LONG */
|
||||||
|
|
||||||
|
#define CPU_BITS_ALL \
|
||||||
|
{ \
|
||||||
|
[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
|
||||||
|
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
||||||
|
}
|
||||||
|
#endif /* NR_CPUS > BITS_PER_LONG */
|
||||||
|
|
||||||
|
/*
|
||||||
|
*
|
||||||
|
* From here down, all obsolete. Use cpumask_ variants!
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
|
||||||
|
/* 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)
|
||||||
|
|
||||||
|
#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
|
||||||
|
|
||||||
|
#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)
|
||||||
|
|
||||||
|
#if NR_CPUS <= BITS_PER_LONG
|
||||||
|
|
||||||
|
#define CPU_MASK_ALL \
|
||||||
|
(cpumask_t) { { \
|
||||||
|
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
||||||
|
} }
|
||||||
|
|
||||||
|
#else
|
||||||
|
|
||||||
|
#define CPU_MASK_ALL \
|
||||||
|
(cpumask_t) { { \
|
||||||
|
[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
|
||||||
|
[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
|
||||||
|
} }
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define CPU_MASK_NONE \
|
||||||
|
(cpumask_t) { { \
|
||||||
|
[0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
|
||||||
|
} }
|
||||||
|
|
||||||
|
#define CPU_MASK_CPU0 \
|
||||||
|
(cpumask_t) { { \
|
||||||
|
[0] = 1UL \
|
||||||
|
} }
|
||||||
|
|
||||||
|
#if NR_CPUS == 1
|
||||||
|
#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)
|
||||||
|
#else /* NR_CPUS > 1 */
|
||||||
|
int __first_cpu(const cpumask_t *srcp);
|
||||||
|
int __next_cpu(int n, const cpumask_t *srcp);
|
||||||
|
int __any_online_cpu(const cpumask_t *mask);
|
||||||
|
|
||||||
|
#define first_cpu(src) __first_cpu(&(src))
|
||||||
|
#define next_cpu(n, src) __next_cpu((n), &(src))
|
||||||
|
#define any_online_cpu(mask) __any_online_cpu(&(mask))
|
||||||
|
#define for_each_cpu_mask(cpu, mask) \
|
||||||
|
for ((cpu) = -1; \
|
||||||
|
(cpu) = next_cpu((cpu), (mask)), \
|
||||||
|
(cpu) < NR_CPUS; )
|
||||||
|
#endif /* SMP */
|
||||||
|
|
||||||
|
#if NR_CPUS <= 64
|
||||||
|
|
||||||
|
#define for_each_cpu_mask_nr(cpu, mask) for_each_cpu_mask(cpu, mask)
|
||||||
|
|
||||||
|
#else /* NR_CPUS > 64 */
|
||||||
|
|
||||||
|
int __next_cpu_nr(int n, const cpumask_t *srcp);
|
||||||
|
#define for_each_cpu_mask_nr(cpu, mask) \
|
||||||
|
for ((cpu) = -1; \
|
||||||
|
(cpu) = __next_cpu_nr((cpu), &(mask)), \
|
||||||
|
(cpu) < nr_cpu_ids; )
|
||||||
|
|
||||||
|
#endif /* NR_CPUS > 64 */
|
||||||
|
|
||||||
|
#define cpus_addr(src) ((src).bits)
|
||||||
|
|
||||||
|
#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
|
||||||
|
static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
|
||||||
|
{
|
||||||
|
set_bit(cpu, dstp->bits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpu_clear(cpu, dst) __cpu_clear((cpu), &(dst))
|
||||||
|
static inline void __cpu_clear(int cpu, volatile cpumask_t *dstp)
|
||||||
|
{
|
||||||
|
clear_bit(cpu, dstp->bits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_setall(dst) __cpus_setall(&(dst), NR_CPUS)
|
||||||
|
static inline void __cpus_setall(cpumask_t *dstp, int nbits)
|
||||||
|
{
|
||||||
|
bitmap_fill(dstp->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_clear(dst) __cpus_clear(&(dst), NR_CPUS)
|
||||||
|
static inline void __cpus_clear(cpumask_t *dstp, int nbits)
|
||||||
|
{
|
||||||
|
bitmap_zero(dstp->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* No static inline type checking - see Subtlety (1) above. */
|
||||||
|
#define cpu_isset(cpu, cpumask) test_bit((cpu), (cpumask).bits)
|
||||||
|
|
||||||
|
#define cpu_test_and_set(cpu, cpumask) __cpu_test_and_set((cpu), &(cpumask))
|
||||||
|
static inline int __cpu_test_and_set(int cpu, cpumask_t *addr)
|
||||||
|
{
|
||||||
|
return test_and_set_bit(cpu, addr->bits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_and(dst, src1, src2) __cpus_and(&(dst), &(src1), &(src2), NR_CPUS)
|
||||||
|
static inline int __cpus_and(cpumask_t *dstp, const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_or(dst, src1, src2) __cpus_or(&(dst), &(src1), &(src2), NR_CPUS)
|
||||||
|
static inline void __cpus_or(cpumask_t *dstp, const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_xor(dst, src1, src2) __cpus_xor(&(dst), &(src1), &(src2), NR_CPUS)
|
||||||
|
static inline void __cpus_xor(cpumask_t *dstp, const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_andnot(dst, src1, src2) \
|
||||||
|
__cpus_andnot(&(dst), &(src1), &(src2), NR_CPUS)
|
||||||
|
static inline int __cpus_andnot(cpumask_t *dstp, const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_equal(src1, src2) __cpus_equal(&(src1), &(src2), NR_CPUS)
|
||||||
|
static inline int __cpus_equal(const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_equal(src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_intersects(src1, src2) __cpus_intersects(&(src1), &(src2), NR_CPUS)
|
||||||
|
static inline int __cpus_intersects(const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_intersects(src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_subset(src1, src2) __cpus_subset(&(src1), &(src2), NR_CPUS)
|
||||||
|
static inline int __cpus_subset(const cpumask_t *src1p,
|
||||||
|
const cpumask_t *src2p, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_subset(src1p->bits, src2p->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
|
||||||
|
static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_empty(srcp->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
|
||||||
|
static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
|
||||||
|
{
|
||||||
|
return bitmap_weight(srcp->bits, nbits);
|
||||||
|
}
|
||||||
|
|
||||||
|
#define cpus_shift_left(dst, src, n) \
|
||||||
|
__cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
|
||||||
|
static inline void __cpus_shift_left(cpumask_t *dstp,
|
||||||
|
const cpumask_t *srcp, int n, int nbits)
|
||||||
|
{
|
||||||
|
bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
|
||||||
|
}
|
||||||
|
#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
|
||||||
|
|
||||||
#endif /* __LINUX_CPUMASK_H */
|
#endif /* __LINUX_CPUMASK_H */
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue