From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757570Ab0JWPDH (ORCPT ); Sat, 23 Oct 2010 11:03:07 -0400 Received: from www.tglx.de ([62.245.132.106]:49050 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757041Ab0JWPDF (ORCPT ); Sat, 23 Oct 2010 11:03:05 -0400 Date: Sat, 23 Oct 2010 17:02:48 +0200 (CEST) From: Thomas Gleixner To: Linus Torvalds cc: Andrew Morton , LKML , Ingo Molnar , "H. Peter Anvin" Subject: [GIT pull] x86 setup for 2.6.37 Message-ID: User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus, Please pull the latest x86-setup-for-linus git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-setup-for-linus Thanks, tglx ------------------> Zhao Yakui (1): x86, setup: Use string copy operation to optimze copy in kernel compression arch/x86/boot/compressed/misc.c | 29 +++++++++++++++++++++++------ 1 files changed, 23 insertions(+), 6 deletions(-) diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 8f7bef8..23f315c 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -229,18 +229,35 @@ void *memset(void *s, int c, size_t n) ss[i] = c; return s; } - +#ifdef CONFIG_X86_32 void *memcpy(void *dest, const void *src, size_t n) { - int i; - const char *s = src; - char *d = dest; + int d0, d1, d2; + asm volatile( + "rep ; movsl\n\t" + "movl %4,%%ecx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) + : "memory"); - for (i = 0; i < n; i++) - d[i] = s[i]; return dest; } +#else +void *memcpy(void *dest, const void *src, size_t n) +{ + long d0, d1, d2; + asm volatile( + "rep ; movsq\n\t" + "movq %4,%%rcx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) + : "memory"); + return dest; +} +#endif static void error(char *x) {