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authorSebastian Siewior <bigeasy@linutronix.de>2008-05-01 12:17:49 +1000
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-01 08:08:36 -0700
commit6c5a7d504fb0e27aa90b96267177d434642a393d (patch)
tree2735d367a526fd9136f22fc117d99ab53e3f7577 /arch/m68knommu
parent0042a1f7ecbc5d40eb2164f375ec87ecf3494418 (diff)
downloadblackbird-op-linux-6c5a7d504fb0e27aa90b96267177d434642a393d.tar.gz
blackbird-op-linux-6c5a7d504fb0e27aa90b96267177d434642a393d.zip
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>
Diffstat (limited to 'arch/m68knommu')
-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 1af7c1d650f6..1e3c0dcbd7ac 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
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