tree e875baa006457bdffd536fe97fffe03078c91c4f
parent f01af9f85855e38fbd601e033a8eac204cc4cc1c
author Miao Xie <miaox@cn.fujitsu.com> 1353057830 +0800
committer Al Viro <viro@zeniv.linux.org.uk> 1356028578 -0500

vfs, freeze: use ACCESS_ONCE() to guard access to ->mnt_flags

The compiler may optimize the while loop and make the check just be done once,
so we should use ACCESS_ONCE() to guard access to ->mnt_flags

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>