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 a0acae0e886d44bd5ce6d2f173c1ace0fcf0d9f6, 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>
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 2b15ae6..f67601c 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -145,6 +145,7 @@
mov r15, r4
mov r12, r5 ! set arg1(save_r0)
mov r0, r6
+ sti
mov.l 2f, r1
mov.l 3f, r0
jmp @r1