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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
commit b53e921ba1
5 changed files with 30 additions and 29 deletions
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2
include/linux/sched.h
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@ -2034,7 +2034,7 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm)
}
#endif
extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
extern int sched_mc_power_savings, sched_smt_power_savings;