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[PATCH] sched: hardcode non-smp set_cpus_allowed

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Simplify the UP (1 CPU) implementatin of set_cpus_allowed.

The one CPU is hardcoded to be cpu 0 - so just test for that bit, and avoid
having to pick up the cpu_online_map.

Also, unexport cpu_online_map: it was only needed for set_cpus_allowed().

Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Jackson 2005-10-30 15:03:21 -08:00 committed by Linus Torvalds
parent 70a6a0cb92
commit 4098f9918e
2 changed files with 1 additions and 2 deletions
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2
include/linux/sched.h
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@ -940,7 +940,7 @@ extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
#else
static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
{
if (!cpus_intersects(new_mask, cpu_online_map))
if (!cpu_isset(0, new_mask))
return -EINVAL;
return 0;
}

1
kernel/sched.c
View file

@ -3877,7 +3877,6 @@ EXPORT_SYMBOL(cpu_present_map);
#ifndef CONFIG_SMP
cpumask_t cpu_online_map = CPU_MASK_ALL;
EXPORT_SYMBOL_GPL(cpu_online_map);
cpumask_t cpu_possible_map = CPU_MASK_ALL;
#endif