From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933127AbWFZXlB (ORCPT ); Mon, 26 Jun 2006 19:41:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933144AbWFZXk7 (ORCPT ); Mon, 26 Jun 2006 19:40:59 -0400 Received: from cust9421.vic01.dataco.com.au ([203.171.70.205]:30623 "EHLO nigel.suspend2.net") by vger.kernel.org with ESMTP id S933111AbWFZWef (ORCPT ); Mon, 26 Jun 2006 18:34:35 -0400 From: Nigel Cunningham Subject: [Suspend2][ 6/9] [Suspend2] Get nonconflicting page. Date: Tue, 27 Jun 2006 08:34:33 +1000 To: linux-kernel@vger.kernel.org Message-Id: <20060626223431.3963.46405.stgit@nigel.suspend2.net> In-Reply-To: <20060626223412.3963.1484.stgit@nigel.suspend2.net> References: <20060626223412.3963.1484.stgit@nigel.suspend2.net> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit User-Agent: StGIT/0.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In preparation for the atomic restore, get a page that can safely be used during the restore - ie, that isn't a location of a page that will be restored. Signed-off-by: Nigel Cunningham kernel/power/pagedir.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/kernel/power/pagedir.c b/kernel/power/pagedir.c index c23ca58..4cdc0ef 100644 --- a/kernel/power/pagedir.c +++ b/kernel/power/pagedir.c @@ -270,3 +270,21 @@ void suspend_mark_pages_for_pageset2(voi } +/* suspend_get_nonconflicting_page + * + * Description: Gets order zero pages that won't be overwritten + * while copying the original pages. + */ + +unsigned long suspend_get_nonconflicting_page(void) +{ + struct page *page; + + do { + page = alloc_pages(GFP_ATOMIC | __GFP_NOWARN | __GFP_ZERO, 0); + BUG_ON(!page); + } while(PagePageset1(page)); + + return (unsigned long) page_address(page); +} + -- Nigel Cunningham nigel at suspend2 dot net