sched: add wait_for_completion_killable_timeout

Add missing _killable_timeout variant for wait_for_completion that will
return when a timeout expires or the task is killed.

CC: Ingo Molnar <mingo@elte.hu>
CC: Andreas Herrmann <andreas.herrmann3@amd.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Mike Galbraith <efault@gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/completion.h b/include/linux/completion.h
index 4a6b604ef7e4..51e3145196f6 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -83,6 +83,8 @@ extern unsigned long wait_for_completion_timeout(struct completion *x,
                                                    unsigned long timeout);
 extern unsigned long wait_for_completion_interruptible_timeout(
                         struct completion *x, unsigned long timeout);
+extern unsigned long wait_for_completion_killable_timeout(
+                        struct completion *x, unsigned long timeout);
 extern bool try_wait_for_completion(struct completion *x);
 extern bool completion_done(struct completion *x);