The attached patch ensures that we grab vfsmount_lock when grabbing a 
reference to mnt_parent in follow_up and follow_dotdot.

We also don't need to access ->mnt_parent in follow_mount and 
__follow_down to mntput because we already the parent pointer on the stack.


-- 
Mike Waychison
Sun Microsystems, Inc.
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1 (416) 202-8336 voice
mailto: Michael.Waychison@Sun.COM
http://www.sun.com

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