tree 1493bc7166ace04d9ac2f4d5383eaab1d43e17c4
parent b20bd1a5e78af267dc4b6e1ffed48d5d776302c5
author Al Viro <viro@zeniv.linux.org.uk> 1269285751 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1274481074 -0400

Saner locking around deactivate_super()

Make sure that s_umount is acquired *before* we drop the final
active reference; we still have the fast path (atomic_dec_unless)
and we have gotten rid of the window between the moment when
s_active hits zero and s_umount is acquired.  Which simplifies
the living hell out of grab_super() and inotify pin_to_kill()
stuff.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>