From: Tao Ma <boyu.mt@taobao.com>
Date: Mon, 31 Oct 2011 21:30:44 +0000 (-0400)
Subject: ext4: Create helper function for EXT4_IO_END_UNWRITTEN and i_aiodio_unwritten
X-Git-Tag: v3.2-rc1~85^2~10
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0edeb71dc9133bfb505d3bf59642e07cd936613e;p=pandora-kernel.git

ext4: Create helper function for EXT4_IO_END_UNWRITTEN and i_aiodio_unwritten

EXT4_IO_END_UNWRITTEN flag set and the increase of i_aiodio_unwritten
should be done simultaneously since ext4_end_io_nolock always clear
the flag and decrease the counter in the same time.

We have found some bugs that the flag is set while leaving
i_aiodio_unwritten unchanged(commit 32c80b32c053d). So this patch just tries
to create a helper function to wrap them to avoid any future bug.
The idea is inspired by Eric.

Cc: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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