From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx165.postini.com [74.125.245.165]) by kanga.kvack.org (Postfix) with SMTP id 2E3566B0083 for ; Tue, 17 Apr 2012 08:28:25 -0400 (EDT) Received: by lbbgp10 with SMTP id gp10so2893088lbb.14 for ; Tue, 17 Apr 2012 05:28:23 -0700 (PDT) Subject: [PATCH linux-next] mm/hugetlb: fix warning in alloc_huge_page/dequeue_huge_page_vma From: Konstantin Khlebnikov Date: Tue, 17 Apr 2012 16:28:19 +0400 Message-ID: <20120417122819.7438.26117.stgit@zurg> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mel Gorman This patch fixes gcc warning (and bug?) introduced in linux-next commit cc9a6c877 ("cpuset: mm: reduce large amounts of memory barrier related damage v3") Local variable "page" can be uninitialized if nodemask from vma policy does not intersects with nodemask from cpuset. Even if it wouldn't happens it's better to initialize this variable explicitly than to introduce kernel oops on weird corner case. mm/hugetlb.c: In function a??alloc_huge_pagea??: mm/hugetlb.c:1135:5: warning: a??pagea?? may be used uninitialized in this function Signed-off-by: Konstantin Khlebnikov Cc: Mel Gorman --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 4314a88..dcf4a55 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -532,7 +532,7 @@ static struct page *dequeue_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, unsigned long address, int avoid_reserve) { - struct page *page; + struct page *page = NULL; struct mempolicy *mpol; nodemask_t *nodemask; struct zonelist *zonelist; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org