From ecbab71c521819716e204659dfe72fc39d00630a Mon Sep 17 00:00:00 2001
From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Tue, 27 Jan 2009 23:20:00 +0000
Subject: [PATCH] [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 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 77b04747553..85040cfeb5e 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -650,6 +650,7 @@ ENTRY(fp_enter)
 no_fp:	mov	pc, lr
 
 __und_usr_unknown:
+	enable_irq
 	mov	r0, sp
 	adr	lr, ret_from_exception
 	b	do_undefinstr
-- 
2.20.1