mnt: Add MNT_UMOUNT flag
authorEric W. Biederman <ebiederm@xmission.com>
Tue, 23 Dec 2014 00:30:08 +0000 (18:30 -0600)
committerEric W. Biederman <ebiederm@xmission.com>
Fri, 3 Apr 2015 01:34:18 +0000 (20:34 -0500)
commit590ce4bcbfb4e0462a720a4ad901e84416080bba
treee5597263904eda7b9e869e57851c6f5dd6737e47
parentc003b26ff98ca04a180ff34c38c007a3998d62f9
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>
fs/namespace.c
fs/pnode.c
include/linux/mount.h