commit ecbab71c521819716e204659dfe72fc39d00630a
author Russell King <rmk@dyn-67.arm.linux.org.uk> Tue Jan 27 23:20:00 2009 +0000
committer Russell King <rmk+kernel@arm.linux.org.uk> Wed Jan 28 10:19:53 2009 +0000
tree 82b8913f99c4a019ac9f2e0271f323b28f6bcca4
parent 9ce8bb55e32d11bb82e19e76bdd2cf1c2ed32fd1

[ARM] call undefined instruction exception handler with irqs enabled

Aaro says:
> With spinlock debugs enabled I get might_sleep() warnings when using
> ptrace.

tracked down to a missing enable_irq before calling do_undefinstr().

Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Tested-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/entry-armv.S

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 77b0474..85040cf 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -650,6 +650,7 @@
 no_fp:	mov	pc, lr
 
 __und_usr_unknown:
+	enable_irq
 	mov	r0, sp
 	adr	lr, ret_from_exception
 	b	do_undefinstr