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[PATCH] BUG() if setscheduler is called from interrupt context

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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>
This commit is contained in:
Steven Rostedt 2006-06-27 02:54:44 -07:00 committed by Linus Torvalds
parent 9fea80e4d9
commit 66e5393a78
1 changed files with 2 additions and 0 deletions
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2
kernel/sched.c
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@ -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)