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m68knommu: fix compare race in sched related code

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The interrupts must be disabled before considering the need resched
bit of the task struct and they have to be disabled before calling
schedule()

Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sebastian Siewior 2008-05-01 12:17:49 +10:00 committed by Linus Torvalds
parent 0042a1f7ec
commit 6c5a7d504f
1 changed files with 2 additions and 0 deletions
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arch/m68knommu/platform/coldfire/entry.S
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@ -103,6 +103,7 @@ ret_from_signal:
addql #4,%sp
ret_from_exception:
move #0x2700,%sr /* disable intrs */
btst #5,%sp@(PT_SR) /* check if returning to kernel */
jeq Luser_return /* if so, skip resched, signals */
@ -156,6 +157,7 @@ Lreturn:
Lwork_to_do:
movel %a0@(TI_FLAGS),%d1 /* get thread_info->flags */
move #0x2000,%sr /* enable intrs again */
btst #TIF_NEED_RESCHED,%d1
jne reschedule