Commit 6c5a7d50 authored May 01, 2008 by Sebastian Siewior Committed by Linus Torvalds May 01, 2008

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>

parent 0042a1f7

arch/m68knommu/platform/coldfire/entry.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -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