From: Zheng Liu <gnehzuil.liu@gmail.com>
Date: Sat, 30 Jun 2012 23:12:57 +0000 (-0400)
Subject: ext4: honor O_(D)SYNC semantic in ext4_fallocate()
X-Git-Tag: v3.6-rc1~69^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4e95b3316c4daa43224753bb98f41456fef86c7;p=pandora-kernel.git

ext4: honor O_(D)SYNC semantic in ext4_fallocate()

Ext4 must make sure the transaction to be commited to the disk when
user opens a file with O_(D)SYNC flag and do a fallocate(2) call.

This problem had been reported by Christoph Hellwig in this thread:
http://www.spinics.net/lists/linux-btrfs/msg13621.html

Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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