From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 1 Jun 2012 03:46:01 +0000 (-0400)
Subject: ext4: don't trash state flags in EXT4_IOC_SETFLAGS
X-Git-Tag: v3.5-rc1~16^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79906964a187c405db72a3abc60eb9b50d804fbc;p=pandora-kernel.git

ext4: don't trash state flags in EXT4_IOC_SETFLAGS

In commit 353eb83c we removed i_state_flags with 64-bit longs, But
when handling the EXT4_IOC_SETFLAGS ioctl, we replace i_flags
directly, which trashes the state flags which are stored in the high
32-bits of i_flags on 64-bit platforms.  So use the the
ext4_{set,clear}_inode_flags() functions which use atomic bit
manipulation functions instead.

Reported-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
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