Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763959AbZAUIsX (ORCPT ); Wed, 21 Jan 2009 03:48:23 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932157AbZAUIql (ORCPT ); Wed, 21 Jan 2009 03:46:41 -0500 Received: from hera.kernel.org ([140.211.167.34]:38080 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932139AbZAUIqk (ORCPT ); Wed, 21 Jan 2009 03:46:40 -0500 From: Tejun Heo To: mingo@elte.hu, linux-kernel@vger.kernel.org, brgerst@gmail.com Cc: Tejun Heo Subject: [PATCH 03/10] x86: fix percpu_write with 64-bit constants Date: Wed, 21 Jan 2009 17:46:11 +0900 Message-Id: <1232527578-1960-4-git-send-email-tj@kernel.org> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1232527578-1960-1-git-send-email-tj@kernel.org> References: <1232527578-1960-1-git-send-email-tj@kernel.org> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Wed, 21 Jan 2009 08:46:25 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1158 Lines: 35 From: Brian Gerst Impact: slightly better code generation for percpu_to_op() The processor will sign-extend 32-bit immediate values in 64-bit operations. Use the 'e' constraint ("32-bit signed integer constant, or a symbolic reference known to fit that range") for 64-bit constants. Signed-off-by: Brian Gerst Signed-off-by: Tejun Heo --- arch/x86/include/asm/percpu.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h index ce980db..0b64af4 100644 --- a/arch/x86/include/asm/percpu.h +++ b/arch/x86/include/asm/percpu.h @@ -75,7 +75,7 @@ do { \ case 8: \ asm(op "q %1,"__percpu_arg(0) \ : "+m" (var) \ - : "r" ((T__)val)); \ + : "re" ((T__)val)); \ break; \ default: __bad_percpu_size(); \ } \ -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/