From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 25 Nov 2008 05:42:37 +0000 (-0500)
Subject: x86: use limited register constraint for setnz
X-Git-Tag: v2.6.28-rc7~45^2~7
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5cf02b7bafddb6c3c16ddfb23d3ce187f70528ba;p=linux-2.6-omap-h63xx.git

x86: use limited register constraint for setnz

Impact: build fix with certain compilers

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 <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/boot/tty.c b/arch/x86/boot/tty.c
index 0be77b39328..7e8e8b25f5f 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;
 }