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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>
hifive-unleashed-5.1
Juri Lelli 2015-09-02 11:01:35 +01:00 committed by Ingo Molnar
parent 2726d6ce38
commit f52405757e
1 changed files with 2 additions and 1 deletions
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3
kernel/locking/rtmutex.c
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@ -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;
}