From: H. Peter Anvin <hpa@zytor.com>
Date: Thu, 2 Aug 2007 17:45:49 +0000 (-0400)
Subject: [x86 setup] EDD: add missing =m constraint
X-Git-Tag: v2.6.23-rc2~12^2~1
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=463c9a9f7d1f746c251761cef3af5c808394b7e1;p=~shefty%2Frdma-dev.git

[x86 setup] EDD: add missing =m constraint

Add a missing =m constraint to the EDD-probing code, that could have
caused improper dead-code elimination.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/arch/i386/boot/edd.c b/arch/i386/boot/edd.c
index 77d92daf792..658834d9f92 100644
--- a/arch/i386/boot/edd.c
+++ b/arch/i386/boot/edd.c
@@ -127,7 +127,7 @@ static int get_edd_info(u8 devno, struct edd_info *ei)
 	ax = 0x4800;
 	dx = devno;
 	asm("pushfl; int $0x13; popfl"
-	    : "+a" (ax), "+d" (dx)
+	    : "+a" (ax), "+d" (dx), "=m" (ei->params)
 	    : "S" (&ei->params)
 	    : "ebx", "ecx", "edi");