From 788c44ff3dc52cc20cec88200bda758acb57cc66 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Mon, 30 Nov 2015 20:34:20 -0500 Subject: [PATCH] sched/core: Remove false-positive warning from wake_up_process() commit 119d6f6a3be8b424b200dcee56e74484d5445f7e upstream. Because wakeups can (fundamentally) be late, a task might not be in the expected state. Therefore testing against a task's state is racy, and can yield false positives. Signed-off-by: Sasha Levin Signed-off-by: Peter Zijlstra (Intel) Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: oleg@redhat.com Fixes: 9067ac85d533 ("wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task") Link: http://lkml.kernel.org/r/1448933660-23082-1-git-send-email-sasha.levin@oracle.com Signed-off-by: Ingo Molnar [bwh: Backported to 3.2: adjust filename] Signed-off-by: Ben Hutchings (cherry picked from commit 0e796c1b57fdd97fc040b0b78ff7fea6c0a4a39d) Signed-off-by: Willy Tarreau --- kernel/sched.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/sched.c b/kernel/sched.c index 42bf6a668e91c..fe26b86cdbfcc 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -2618,7 +2618,6 @@ out: */ int wake_up_process(struct task_struct *p) { - WARN_ON(task_is_stopped_or_traced(p)); return try_to_wake_up(p, TASK_NORMAL, 0); } EXPORT_SYMBOL(wake_up_process); -- 2.47.2