[git pull] several fixes

[Al Viro <viro@ZenIV.linux.org.uk>]

Several bugfixes (all of them -stable fodder).  Alexey's one deals with
double mutex_lock() in UFS (apparently, nobody has tried to test "ufs: sb mutex
merge + mutex_destroy" on something like file creation/removal on ufs -
it's a 100%-guaranteed deadlock).  Mine deal with two kinds of umount bugs,
in umount propagation and in handling of automounted submounts, both
resulting in bogus transient EBUSY from umount.  Please, pull from the
usual place:
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Al Viro (2):
      get rid of propagate_umount() mistakenly treating slaves as busy.
      fix EBUSY on umount() from MNT_SHRINKABLE

Alexey Khoroshilov (1):
      ufs: fix deadlocks introduced by sb mutex merge

Diffstat:
 fs/namespace.c |   10 +++++++++-
 fs/pnode.c     |    1 +
 fs/ufs/inode.c |    7 ++-----
 fs/ufs/namei.c |   14 ++++++--------
 4 files changed, 18 insertions(+), 14 deletions(-)