unlikely() was dropped in commit ce03e41 ("sched/core: Drop unlikely behind BUG_ON()"), but commit 29d6455 ("sched: panic on corrupted stack end") dropped BUG_ON() and called panic directly.
Now we should bring unlikely() back for branch prediction. Signed-off-by: WANG Chao <wcw...@gmail.com> --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 017d539..7db442c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3170,7 +3170,7 @@ static noinline void __schedule_bug(struct task_struct *prev) static inline void schedule_debug(struct task_struct *prev) { #ifdef CONFIG_SCHED_STACK_END_CHECK - if (task_stack_end_corrupted(prev)) + if (unlikely(task_stack_end_corrupted(prev))) panic("corrupted stack end detected inside scheduler\n"); #endif -- 2.8.4