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sh: Ensure IRQs are enabled across do_notify_resume(). 

do_notify_resume() can trigger the freezer via the try_to_freeze() path
(both explicitly through a redundant call in do_signal() or via
get_signal_to_deliver()). That IRQs were disabled across this callsite
became apparent with the might_sleep() introduction in try_to_freeze() by
Tejun in a0acae0e88, resulting in:

	BUG: sleeping function called from invalid context at include/linux/freezer.h:45
	in_atomic(): 0, irqs_disabled(): 1, pid: 819, name: ntpd
	no locks held by ntpd/819.
	Stack: (0x9c81be80 to 0x9c81c000)
	...

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2012-01-10 16:30:37 +09:00
parent 33dc5c1000
commit 6330c04bb4
1 changed files with 1 additions and 0 deletions
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1
arch/sh/kernel/entry-common.S
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@ -145,6 +145,7 @@ work_notifysig:
mov r15, r4
mov r12, r5 ! set arg1(save_r0)
mov r0, r6
sti
mov.l 2f, r1
mov.l 3f, r0
jmp @r1