From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964820AbWFZXDj (ORCPT ); Mon, 26 Jun 2006 19:03:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933265AbWFZWjy (ORCPT ); Mon, 26 Jun 2006 18:39:54 -0400 Received: from cust9421.vic01.dataco.com.au ([203.171.70.205]:19639 "EHLO nigel.suspend2.net") by vger.kernel.org with ESMTP id S933267AbWFZWjS (ORCPT ); Mon, 26 Jun 2006 18:39:18 -0400 From: Nigel Cunningham Subject: [Suspend2][ 04/35] [Suspend2] Does a filewriter page have contiguous blocks? Date: Tue, 27 Jun 2006 08:39:17 +1000 To: linux-kernel@vger.kernel.org Message-Id: <20060626223915.4685.72892.stgit@nigel.suspend2.net> In-Reply-To: <20060626223902.4685.52543.stgit@nigel.suspend2.net> References: <20060626223902.4685.52543.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 To simplify things, pages in the file being used by the filewriter which don't have contiguous blocks are ignored. This function determines whether a given page meets this criteria by bmapping each sector in the page to check. Signed-off-by: Nigel Cunningham kernel/power/suspend_file.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/kernel/power/suspend_file.c b/kernel/power/suspend_file.c index caa86bc..41aaed4 100644 --- a/kernel/power/suspend_file.c +++ b/kernel/power/suspend_file.c @@ -136,3 +136,21 @@ static int filewriter_storage_available( return result; } +static int has_contiguous_blocks(int page_num) +{ + int j; + sector_t last = 0; + + for (j = 0; j < devinfo.blocks_per_page; j++) { + sector_t this = bmap(target_inode, + page_num * devinfo.blocks_per_page + j); + + if (!this || (last && (last + 1) != this)) + break; + + last = this; + } + + return (j == devinfo.blocks_per_page); +} + -- Nigel Cunningham nigel at suspend2 dot net