tree 2ee3fe90e5ac72a2b36c91947b38c3e6da9a9012
parent cd4a40174b71acd021877341684d8bb1dc8ea4ae
author Eric W. Biederman <ebiederm@xmission.com> 1419879821 -0600
committer Eric W. Biederman <ebiederm@xmission.com> 1428597594 -0500

mnt: Factor out unhash_mnt from detach_mnt and umount_tree

Create a function unhash_mnt that contains the common code between
detach_mnt and umount_tree, and use unhash_mnt in place of the common
code.  This add a unncessary list_del_init(mnt->mnt_child) into
umount_tree but given that mnt_child is already empty this extra
line is a noop.

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