diff options
| author |   Mike Travis <travis@sgi.com> | 2008-04-04 18:11:02 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:59 +0200 |
| commit | 321a8e9dcb714f3c350ba55e41ed447bf3f05fac (patch) | |
| tree | e75ca8ebcee0954dc6e313864ebba9f72e984fc8 /include/linux/cpumask.h | |
| parent | cpumask: reduce stack usage in SD_x_INIT initializers (diff) | |
| download | linux-dev-321a8e9dcb714f3c350ba55e41ed447bf3f05fac.tar.xz linux-dev-321a8e9dcb714f3c350ba55e41ed447bf3f05fac.zip | |
cpumask: add CPU_MASK_ALL_PTR macro
* Add a static cpumask_t variable "CPU_MASK_ALL_PTR" to use as
a pointer reference to CPU_MASK_ALL. This reduces where possible
the instances where CPU_MASK_ALL allocates and fills a large
array on the stack. Used only if NR_CPUS > BITS_PER_LONG.
* Change init/main.c to use new set_cpus_allowed_ptr().
Depends on:
[sched-devel]: sched: add new set_cpus_allowed_ptr function
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/cpumask.h')
| -rw-r--r-- | include/linux/cpumask.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 67e0e38d32b1..629102feaa66 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -243,6 +243,8 @@ int __next_cpu(int n, const cpumask_t *srcp); [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \ } } +#define CPU_MASK_ALL_PTR (&CPU_MASK_ALL) + #else #define CPU_MASK_ALL \ @@ -251,6 +253,10 @@ int __next_cpu(int n, const cpumask_t *srcp); [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \ } } +/* cpu_mask_all is in init/main.c */ +extern cpumask_t cpu_mask_all; +#define CPU_MASK_ALL_PTR (&cpu_mask_all) + #endif #define CPU_MASK_NONE \ |