From: Theodore Ts'o <tytso@mit.edu>
Date: Sat, 17 Aug 2013 01:20:41 +0000 (-0400)
Subject: ext4: refactor code to read the extent tree block
X-Git-Tag: v3.12-rc1~148^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d7ea89e756ea18a3b08cd396e2a4c0c12d473a8;p=pandora-kernel.git

ext4: refactor code to read the extent tree block

Refactor out the code needed to read the extent tree block into a
single read_extent_tree_block() function.  In addition to simplifying
the code, it also makes sure that we call the ext4_ext_load_extent
tracepoint whenever we need to read an extent tree block from disk.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
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