Commit-ID: 71362650b555a5b24c732e455484cc7cac1c8588 Gitweb: http://git.kernel.org/tip/71362650b555a5b24c732e455484cc7cac1c8588 Author: Juri Lelli <[email protected]> AuthorDate: Tue, 14 Jan 2014 12:03:51 +0100 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 16 Jan 2014 09:27:11 +0100
sched/deadline: No need to check p if dl_se is valid Dan Carpenter reported new 'Smatch' warnings: > tree: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core > head: 130816ce4d5f69167324f7272e70aa3d641677c6 > commit: 1baca4ce16b8cc7d4f50be1f7914799af30a2861 [17/50] sched/deadline: Add SCHED_DEADLINE SMP-related data structures & logic > > kernel/sched/deadline.c:937 pick_next_task_dl() warn: variable dereferenced before check 'p' (see line 934) BUG_ON() already fires if pick_next_dl_entity() doesn't return a valid dl_se. No need to check if p is valid afterward. Reported-by: Dan Carpenter <[email protected]> Signed-off-by: Juri Lelli <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Fixes: 1baca4ce16b8 ("sched/deadline: Add SCHED_DEADLINE SMP-related data structures & logic") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/sched/deadline.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index ee25361..0de2482 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1007,8 +1007,7 @@ struct task_struct *pick_next_task_dl(struct rq *rq) p->se.exec_start = rq_clock_task(rq); /* Running task will never be pushed. */ - if (p) - dequeue_pushable_dl_task(rq, p); + dequeue_pushable_dl_task(rq, p); #ifdef CONFIG_SCHED_HRTICK if (hrtick_enabled(rq)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
