From 6c5a7d504fb0e27aa90b96267177d434642a393d Mon Sep 17 00:00:00 2001 From: Sebastian Siewior Date: Thu, 1 May 2008 12:17:49 +1000 Subject: [PATCH] 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 Signed-off-by: Greg Ungerer Signed-off-by: Linus Torvalds --- arch/m68knommu/platform/coldfire/entry.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/m68knommu/platform/coldfire/entry.S b/arch/m68knommu/platform/coldfire/entry.S index 1af7c1d650..1e3c0dcbd7 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 -- 2.39.5