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authorJuri Lelli <juri.lelli@arm.com>2015-09-02 13:01:35 +0300
committerIngo Molnar <mingo@kernel.org>2015-09-23 10:51:25 +0300
commitf52405757e4e9bddd868d6b8ca501d58f292969f (patch)
tree7d156d27fa8bee40fe88a0b520e06ccbe0e117de /kernel/locking/rtmutex.c
parent2726d6ce389788c7fe724961a6e1bfe569560088 (diff)
downloadlinux-f52405757e4e9bddd868d6b8ca501d58f292969f.tar.xz
sched/deadline, locking/rtmutex: Fix open coded check in rt_mutex_waiter_less()
rt_mutex_waiter_less() check of task deadlines is open coded. Since this is subject to wraparound bugs, make it use the correct helper. Reported-by: Luca Abeni <luca.abeni@unitn.it> Signed-off-by: Juri Lelli <juri.lelli@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1441188096-23021-4-git-send-email-juri.lelli@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/rtmutex.c')
-rw-r--r--kernel/locking/rtmutex.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 7781d801212f..35e9bfcc6ad9 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -158,7 +158,8 @@ rt_mutex_waiter_less(struct rt_mutex_waiter *left,
* then right waiter has a dl_prio() too.
*/
if (dl_prio(left->prio))
- return (left->task->dl.deadline < right->task->dl.deadline);
+ return dl_time_before(left->task->dl.deadline,
+ right->task->dl.deadline);
return 0;
}