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sched: Unify the ->cpus_allowed mask copy 

Currently every sched_class::set_cpus_allowed() implementation has to
copy the cpumask into task_struct::cpus_allowed, this is pointless,
put this copy in the generic code.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/tip-jhl5s9fckd9ptw1fzbqqlrd3@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-06-25 15:45:46 +02:00 committed by Ingo Molnar
parent fa17b507f1
commit 4939602a24
2 changed files with 3 additions and 7 deletions
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7
kernel/sched.c
View File

@ -6161,10 +6161,9 @@ void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask)
{
if (p->sched_class && p->sched_class->set_cpus_allowed)
p->sched_class->set_cpus_allowed(p, new_mask);
else {
cpumask_copy(&p->cpus_allowed, new_mask);
p->rt.nr_cpus_allowed = cpumask_weight(new_mask);
}
cpumask_copy(&p->cpus_allowed, new_mask);
p->rt.nr_cpus_allowed = cpumask_weight(new_mask);
}
/*

3
kernel/sched_rt.c
View File

@ -1608,9 +1608,6 @@ static void set_cpus_allowed_rt(struct task_struct *p,
update_rt_migration(&rq->rt);
}
cpumask_copy(&p->cpus_allowed, new_mask);
p->rt.nr_cpus_allowed = weight;
}
/* Assumes rq->lock is held */