ocfs2: remove handle argument to ocfs2_start_trans()

All callers either pass in NULL directly, or a local variable that is
already set to NULL.

The internals of ocfs2_start_trans() get a nice cleanup as a result.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 9a56bfd..d63ab7b 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -379,7 +379,7 @@
 		}
 	}
 
-	handle = ocfs2_start_trans(osb, NULL, OCFS2_MKNOD_CREDITS);
+	handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS);
 	if (IS_ERR(handle)) {
 		status = PTR_ERR(handle);
 		handle = NULL;
@@ -696,7 +696,7 @@
 		goto out_unlock_inode;
 	}
 
-	handle = ocfs2_start_trans(osb, NULL, OCFS2_LINK_CREDITS);
+	handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS);
 	if (IS_ERR(handle)) {
 		err = PTR_ERR(handle);
 		handle = NULL;
@@ -886,7 +886,7 @@
 		}
 	}
 
-	handle = ocfs2_start_trans(osb, NULL, OCFS2_UNLINK_CREDITS);
+	handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS);
 	if (IS_ERR(handle)) {
 		status = PTR_ERR(handle);
 		handle = NULL;
@@ -1284,7 +1284,7 @@
 		}
 	}
 
-	handle = ocfs2_start_trans(osb, NULL, OCFS2_RENAME_CREDITS);
+	handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS);
 	if (IS_ERR(handle)) {
 		status = PTR_ERR(handle);
 		handle = NULL;
@@ -1652,7 +1652,7 @@
 		}
 	}
 
-	handle = ocfs2_start_trans(osb, NULL, credits);
+	handle = ocfs2_start_trans(osb, credits);
 	if (IS_ERR(handle)) {
 		status = PTR_ERR(handle);
 		handle = NULL;