commit 13caa9fb5b4ce040379523037a0ce4ef867ee0c0
author Miklos Szeredi <mszeredi@suse.cz> Thu Sep 05 11:44:40 2013 +0200
committer Al Viro <viro@zeniv.linux.org.uk> Thu Sep 05 16:23:52 2013 -0400
tree 9a11420d61e35fa4f1dcc583e7629fb404369e49
parent 1191a2bdf012147c33e5fa95255974a3f7bf6e2f

nfs: use check_submounts_and_drop()

Do have_submounts(), shrink_dcache_parent() and d_drop() atomically.

check_submounts_and_drop() can deal with negative dentries and
non-directories as well.

Non-directories can also be mounted on.  And just like directories we don't
want these to disappear with invalidation.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>