Subject: [PATCH 1/1] use limited register constraint for setnz

From: Steven Rostedt <[email-masked]>
Date: Tue, 25 Nov 2008 09:20:42 -0500

From: Steven Rostedt <[email-masked]>

Impact: fix in compiling

GCC can decide to use %dil when "r" is used, which is not valid for
setnz.

This bug was brought out by Stephen Rothwell's merging of the
branch tracer into linux-next.

[ Thanks to Uros Bizjak for recommending 'q' over 'Q' ]

Signed-off-by: Steven Rostedt <[email-masked]>
---
 arch/x86/boot/tty.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/boot/tty.c b/arch/x86/boot/tty.c
index 0be77b3..7e8e8b2 100644
--- a/arch/x86/boot/tty.c
+++ b/arch/x86/boot/tty.c
@@ -74,7 +74,7 @@ static int kbd_pending(void)
 {
 	u8 pending;
 	asm volatile("int $0x16; setnz %0"
-		     : "=rm" (pending)
+		     : "=qm" (pending)
 		     : "a" (0x0100));
 	return pending;
 }
-- 
1.5.6.5

--