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

commit 47a70985e5c093ae03d8ccf633c70a93761d86f2 upstream

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 <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100330165829.GA18284@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/kernel/sched.c b/kernel/sched.c
index c02db4b77d9fd7eca1d971870c176b503aa244eb..92cf8db2376701d91c4a73a6ea5ddd93e8428c82 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -7273,7 +7273,7 @@ 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);