tree 1f98d10a0d3485f49bd59cc78ce0aee74de577c7
parent 7bdb11de8ee4f4ae195e2fa19efd304e0b36c63b
author Eric W. Biederman <ebiederm@xmission.com> 1421384313 -0600
committer Eric W. Biederman <ebiederm@xmission.com> 1428597594 -0500

mnt: Factor umount_mnt from umount_tree

For future use factor out a function umount_mnt from umount_tree.
This function unhashes a mount and remembers where the mount
was mounted so that eventually when the code makes it to a
sleeping context the mountpoint can be dput.

Cc: stable@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>