Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761435AbXFRJsU (ORCPT ); Mon, 18 Jun 2007 05:48:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761364AbXFRJsF (ORCPT ); Mon, 18 Jun 2007 05:48:05 -0400 Received: from wa-out-1112.google.com ([209.85.146.179]:28975 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761320AbXFRJsD (ORCPT ); Mon, 18 Jun 2007 05:48:03 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:from:to:cc:subject:date:message-id; b=Ok11usrLRl2yCMtfL/3FyamTEwsMOrDIv1E/GuIxqCJHYYj4xGwGVb12UG+wTmCWq4Ls4RrVF+qRHPJXKqL123vohqeicbc79sRRWQjoLOykwOxULqzRMVeVF1RCgY8xBpUbjELuTZqxa5/F5m+nJN2l6xR5USPQcc/A+yQxslI= From: Denis Cheng To: trivial@kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH] the memset operation on a automatic array variable should be optimized out by data initialization Date: Mon, 18 Jun 2007 02:48:02 -0700 (PDT) Message-ID: <467654d2.14da600a.3067.ffffbc11@mx.google.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 849 Lines: 23 Is there some comments on this? Signed-Off-By: Denis Cheng -- --- arch/x86_64/mm/init.c.orig 2007-06-07 10:08:04.000000000 +0800 +++ arch/x86_64/mm/init.c 2007-06-18 14:43:15.000000000 +0800 @@ -406,8 +406,7 @@ void __cpuinit zap_low_mappings(int cpu) #ifndef CONFIG_NUMA void __init paging_init(void) { - unsigned long max_zone_pfns[MAX_NR_ZONES]; - memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); + unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, }; max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; max_zone_pfns[ZONE_NORMAL] = end_pfn; - 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/