pipe: add pipe_buf_release() helper

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index b50220c..d82414a 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1985,10 +1985,9 @@
 
 	ret = fuse_dev_do_write(fud, &cs, len);
 
-	for (idx = 0; idx < nbuf; idx++) {
-		struct pipe_buffer *buf = &bufs[idx];
-		buf->ops->release(pipe, buf);
-	}
+	for (idx = 0; idx < nbuf; idx++)
+		pipe_buf_release(pipe, &bufs[idx]);
+
 out:
 	kfree(bufs);
 	return ret;