sched: set_cpus_allowed_ptr(): Don't use rq->migration_thread after unlock

Trivial typo fix. rq->migration_thread can be NULL after
task_rq_unlock(), this is why we have "mt" which should be
 used instead.

Signed-off-by: Oleg Nesterov <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <20100330165829[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/kernel/sched.c b/kernel/sched.c
index 49d2fa7b687a6cd9956e5d7179ab26822bcff6f1..528a10592c16782e813238e050fb1abba79e05e7 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5387,7 +5387,7 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
 
                get_task_struct(mt);
                task_rq_unlock(rq, &flags);
-               wake_up_process(rq->migration_thread);
+               wake_up_process(mt);
                put_task_struct(mt);
                wait_for_completion(&req.done);
                tlb_migrate_finish(p->mm);