tree e5597263904eda7b9e869e57851c6f5dd6737e47
parent c003b26ff98ca04a180ff34c38c007a3998d62f9
author Eric W. Biederman <ebiederm@xmission.com> 1419294608 -0600
committer Eric W. Biederman <ebiederm@xmission.com> 1428024858 -0500

mnt: Add MNT_UMOUNT flag

In some instances it is necessary to know if the the unmounting
process has begun on a mount.  Add MNT_UMOUNT to make that reliably
testable.

This fix gets used in fixing locked mounts in MNT_DETACH

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