get rid of bufmap argument of orangefs_bufmap_put()

it's always equal to __orangefs_bufmap and the latter can't change
until we are done

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index c60019d..1819dee 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -458,9 +458,10 @@
  *
  * no return value
  */
-void orangefs_bufmap_put(struct orangefs_bufmap *bufmap, int buffer_index)
+void orangefs_bufmap_put(int buffer_index)
 {
 	struct slot_args slargs;
+	struct orangefs_bufmap *bufmap = __orangefs_bufmap;
 
 	slargs.slot_count = bufmap->desc_count;
 	slargs.slot_array = bufmap->buffer_index_array;