From patchwork Wed Apr 29 11:13:30 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/2, for, 2.6.31] ext4: Use -1 as the fake block number for delayed new buffer_head Date: Wed, 29 Apr 2009 01:13:30 -0000 From: "Aneesh Kumar K.V" X-Patchwork-Id: 26613 Message-Id: <1241003611-3652-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> To: cmm@us.ibm.com, tytso@mit.edu, sandeen@redhat.com Cc: linux-ext4@vger.kernel.org, "Aneesh Kumar K.V" 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 e91f978..3afd5f1 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) {