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generic: reduce stack pressure in sched_affinity

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* Modify sched_affinity functions to pass cpumask_t variables by reference
    instead of by value.

  * Use new set_cpus_allowed_ptr function.

Depends on:
	[sched-devel]: sched: add new set_cpus_allowed_ptr function

Cc: Paul Jackson <pj@sgi.com>
Cc: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Travis
2008-04-04 18:11:08 -07:00
committed by Ingo Molnar
parent f9a86fcbbb
commit b53e921ba1
5 changed files with 30 additions and 29 deletions
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kernel/rcupreempt.c
+2 -2
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@@ -1007,10 +1007,10 @@ void __synchronize_sched(void)
if (sched_getaffinity(0, &oldmask) < 0)
oldmask = cpu_possible_map;
for_each_online_cpu(cpu) {
sched_setaffinity(0, cpumask_of_cpu(cpu));
sched_setaffinity(0, &cpumask_of_cpu(cpu));
schedule();
}
sched_setaffinity(0, oldmask);
sched_setaffinity(0, &oldmask);
}
EXPORT_SYMBOL_GPL(__synchronize_sched);