From: Eric W. Biederman <ebiederm@aristanetworks.com>
Date: Mon, 20 Sep 2010 07:57:03 +0000 (-0700)
Subject: sysfs: only access bin file vm_ops with the active lock
X-Git-Tag: v2.6.37-rc1~156^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38f49a5132f24d29236820eb5c7dd956e47f94a3;p=pandora-kernel.git

sysfs: only access bin file vm_ops with the active lock

bb->vm_ops is a cached copy of the vm_ops of the underlying
sysfs bin file, which means that after sysfs_bin_remove_file
completes it is only longer valid to deference bb->vm_ops.

So move all of the tests of bb->vm_ops inside of where
we hold the sysfs active lock.

Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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