locks: break delegations on any attribute modification

NFSv4 uses leases to guarantee that clients can cache metadata as well
as data.

Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: David Howells <dhowells@redhat.com>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: Dustin Kirkland <dustin.kirkland@gazzang.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc drivers/base/devtmpfs.c
Simple merge

diff --cc fs/attr.c
Simple merge

diff --cc fs/cachefiles/interface.c
Simple merge

diff --cc fs/ecryptfs/inode.c
Simple merge

diff --cc fs/hpfs/namei.c
Simple merge

diff --cc fs/inode.c
Simple merge

diff --cc fs/nfsd/vfs.c
Simple merge

diff --cc fs/open.c
Simple merge

diff --cc fs/utimes.c
Simple merge

diff --cc include/linux/fs.h
Simple merge