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cpuset: modify cpuset_set_cpus_allowed to use cpumask pointer

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* Modify cpuset_cpus_allowed to return the currently allowed cpuset
    via a pointer argument instead of as the function return value.

  * Use new set_cpus_allowed_ptr function.

  * Cleanup CPU_MASK_ALL and NODE_MASK_ALL uses.

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

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 18:11:07 -07:00
committed by Ingo Molnar
parent f70316dace
commit f9a86fcbbb
4 changed files with 26 additions and 30 deletions
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8
kernel/sched.c
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@@ -4941,13 +4941,13 @@ long sched_setaffinity(pid_t pid, cpumask_t new_mask)
if (retval)
goto out_unlock;
cpus_allowed = cpuset_cpus_allowed(p);
cpuset_cpus_allowed(p, &cpus_allowed);
cpus_and(new_mask, new_mask, cpus_allowed);
again:
retval = set_cpus_allowed(p, new_mask);
if (!retval) {
cpus_allowed = cpuset_cpus_allowed(p);
cpuset_cpus_allowed(p, &cpus_allowed);
if (!cpus_subset(new_mask, cpus_allowed)) {
/*
* We must have raced with a concurrent cpuset
@@ -5661,7 +5661,9 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
/* No more Mr. Nice Guy. */
if (dest_cpu >= nr_cpu_ids) {
cpumask_t cpus_allowed = cpuset_cpus_allowed_locked(p);
cpumask_t cpus_allowed;
cpuset_cpus_allowed_locked(p, &cpus_allowed);
/*
* Try to stay on the same cpuset, where the
* current cpuset may be a subset of all cpus.