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authorSebastian Siewior <bigeasy@linutronix.de>2008-05-01 02:17:49 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-01 15:08:36 (GMT)
commit6c5a7d504fb0e27aa90b96267177d434642a393d (patch)
tree2735d367a526fd9136f22fc117d99ab53e3f7577
parent0042a1f7ecbc5d40eb2164f375ec87ecf3494418 (diff)
downloadlinux-6c5a7d504fb0e27aa90b96267177d434642a393d.tar.xz
m68knommu: fix compare race in sched related code
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>
-rw-r--r--arch/m68knommu/platform/coldfire/entry.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/coldfire/entry.S b/arch/m68knommu/platform/coldfire/entry.S
index 1af7c1d..1e3c0dc 100644
--- a/arch/m68knommu/platform/coldfire/entry.S
+++ b/arch/m68knommu/platform/coldfire/entry.S
@@ -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