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authorSteven Rostedt <rostedt@goodmis.org>2006-06-27 02:54:44 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 17:32:46 -0700
commit66e5393a78b3fcca63e7748e38221dcca61c4aab (patch)
tree57c5408e8e5596863f4abbe1c822bb0c1c7ff059 /kernel/sched.c
parent9fea80e4d984d411aa188baa31225c273ebe0fe6 (diff)
downloadop-kernel-dev-66e5393a78b3fcca63e7748e38221dcca61c4aab.zip
op-kernel-dev-66e5393a78b3fcca63e7748e38221dcca61c4aab.tar.gz
[PATCH] BUG() if setscheduler is called from interrupt context
Thomas Gleixner is adding the call to a rtmutex function in setscheduler. This call grabs a spin_lock that is not always protected by interrupts disabled. So this means that setscheduler cant be called from interrupt context. To prevent this from happening in the future, this patch adds a BUG_ON(in_interrupt()) in that function. (Thanks to akpm <aka. Andrew Morton> for this suggestion). Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 19c0d5d..15abf08 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3862,6 +3862,8 @@ int sched_setscheduler(struct task_struct *p, int policy,
unsigned long flags;
runqueue_t *rq;
+ /* may grab non-irq protected spin_locks */
+ BUG_ON(in_interrupt());
recheck:
/* double check policy once rq lock held */
if (policy < 0)
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