diff options
author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-12-16 20:04:39 +0300 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-12-16 21:01:57 +0300 |
commit | 881232b70b195768a71cd74ff4b4e8ab9502997b (patch) | |
tree | aeafe0a28a7163af445e4f603ab1075c3608c375 /kernel/kthread.c | |
parent | 5da9a0fb673a0ea0a093862f95f6b89b3390c31e (diff) |
sched: Move kthread_bind() back to kthread.c
Since kthread_bind() lost its dependencies on sched.c, move it
back where it came from.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20091216170518.039524041@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/kthread.c')
-rw-r--r-- | kernel/kthread.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index ab7ae57773e1..fbb6222fe7e0 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -150,6 +150,29 @@ struct task_struct *kthread_create(int (*threadfn)(void *data), EXPORT_SYMBOL(kthread_create); /** + * kthread_bind - bind a just-created kthread to a cpu. + * @p: thread created by kthread_create(). + * @cpu: cpu (might not be online, must be possible) for @k to run on. + * + * Description: This function is equivalent to set_cpus_allowed(), + * except that @cpu doesn't need to be online, and the thread must be + * stopped (i.e., just returned from kthread_create()). + */ +void kthread_bind(struct task_struct *p, unsigned int cpu) +{ + /* Must have done schedule() in kthread() before we set_task_cpu */ + if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE)) { + WARN_ON(1); + return; + } + + p->cpus_allowed = cpumask_of_cpu(cpu); + p->rt.nr_cpus_allowed = 1; + p->flags |= PF_THREAD_BOUND; +} +EXPORT_SYMBOL(kthread_bind); + +/** * kthread_stop - stop a thread created by kthread_create(). * @k: thread created by kthread_create(). * |