Introduce path_put()

* Add path_put() functions for releasing a reference to the dentry and
  vfsmount of a struct path in the right order

* Switch from path_release(nd) to path_put(&nd->path)

* Rename dput_path() to path_put_conditional()

[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/powerpc/platforms/cell/spufs/syscalls.c

@@ -73,7 +73,7 @@ static long do_spu_create(const char __user *pathname, unsigned int flags,
 				LOOKUP_OPEN|LOOKUP_CREATE, &nd);
 		if (!ret) {
 			ret = spufs_create(&nd, flags, mode, neighbor);
-			path_release(&nd);
+			path_put(&nd.path);
 		}
 		putname(tmp);
 	}