From: Yongqiang Yang <xiaoqiangnk@gmail.com>
Date: Tue, 3 May 2011 15:45:29 +0000 (-0400)
Subject: ext4: add a function merging extents right and left
X-Git-Tag: v3.0-rc1~140^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=197217a5af79c23609da03eda2a52ee8603eec52;p=pandora-kernel.git

ext4: add a function merging extents right and left

1) Rename ext4_ext_try_to_merge() to ext4_ext_try_to_merge_right().

2) Add a new function ext4_ext_try_to_merge() which tries to merge
   an extent both left and right.

3) Use the new function in ext4_ext_convert_unwritten_endio() and
   ext4_ext_insert_extent().

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Tested-by: Allison Henderson <achender@linux.vnet.ibm.com>
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