From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933233Ab2DSVMX (ORCPT ); Thu, 19 Apr 2012 17:12:23 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:50404 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752456Ab2DSVMU (ORCPT ); Thu, 19 Apr 2012 17:12:20 -0400 Message-Id: <20120419210306.628270838@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Thu, 19 Apr 2012 14:03:44 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, "H. Peter Anvin" , Jeremy Fitzhardinge , Leigh Scott , Thomas Reitmayr Subject: [ 41/75] x86: Use correct byte-sized register constraint in __add() In-Reply-To: <20120419210322.GA6478@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: "H. Peter Anvin" commit 8c91c5325e107ec17e40a59a47c6517387d64eb7 upstream. Similar to: 2ca052a x86: Use correct byte-sized register constraint in __xchg_op() ... the __add() macro also needs to use a "q" constraint in the byte-sized case, lest we try to generate an illegal register. Link: http://lkml.kernel.org/r/4F7A3315.501@goop.org Signed-off-by: H. Peter Anvin Cc: Jeremy Fitzhardinge Cc: Leigh Scott Cc: Thomas Reitmayr Signed-off-by: Greg Kroah-Hartman --- arch/x86/include/asm/cmpxchg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/include/asm/cmpxchg.h +++ b/arch/x86/include/asm/cmpxchg.h @@ -173,7 +173,7 @@ extern void __add_wrong_size(void) switch (sizeof(*(ptr))) { \ case __X86_CASE_B: \ asm volatile (lock "addb %b1, %0\n" \ - : "+m" (*(ptr)) : "ri" (inc) \ + : "+m" (*(ptr)) : "qi" (inc) \ : "memory", "cc"); \ break; \ case __X86_CASE_W: \