From: "Aneesh Kumar K.V" Subject: [PATCH -V4 2/2] ext4: Use -1 as the fake block number for delayed new buffer_head Date: Wed, 29 Apr 2009 10:17:21 +0530 Message-ID: <1240980441-8105-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1240980441-8105-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Cc: linux-ext4@vger.kernel.org, "Aneesh Kumar K.V" To: cmm@us.ibm.com, tytso@mit.edu, sandeen@redhat.com Return-path: Received: from e23smtp09.au.ibm.com ([202.81.31.142]:50149 "EHLO e23smtp09.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751812AbZD2Er3 (ORCPT ); Wed, 29 Apr 2009 00:47:29 -0400 Received: from d23relay01.au.ibm.com (d23relay01.au.ibm.com [202.81.31.243]) by e23smtp09.au.ibm.com (8.13.1/8.13.1) with ESMTP id n3T4NecQ018590 for ; Wed, 29 Apr 2009 00:23:40 -0400 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay01.au.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n3T4lSUQ536876 for ; Wed, 29 Apr 2009 14:47:28 +1000 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n3T4lST8024782 for ; Wed, 29 Apr 2009 14:47:28 +1000 In-Reply-To: <1240980441-8105-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: Block number '0' should not be used as the fake block number for the delayed new buffer. This will result in vfs calling umap_underlying_metadata for block number '0'. So use -1 instead. Signed-off-by: Aneesh Kumar K.V --- fs/ext4/inode.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 12dcfab..c7c2156 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2318,7 +2318,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, /* not enough space to reserve */ return ret; - map_bh(bh_result, inode->i_sb, 0); + map_bh(bh_result, inode->i_sb, -1); set_buffer_new(bh_result); set_buffer_delay(bh_result); } else if (ret > 0) { -- tg: (15262e5..) proper_mappingblock_for_delay (depends on: preallocate_corruption_quickfix)