Btrfs: add and improve comments

This improves the comments at the top of many functions.  It didn't
dive into the guts of functions because I was trying to
avoid merging problems with the new allocator and back reference work.

extent-tree.c and volumes.c were both skipped, and there is definitely
more work todo in cleaning and commenting the code.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 0 insertions, 33 deletions

diff --git a/fs/btrfs/bit-radix.h b/fs/btrfs/bit-radix.h
deleted file mode 100644
index c100f54d5c3..00000000000
--- a/fs/btrfs/bit-radix.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-#ifndef __BIT_RADIX__
-#define __BIT_RADIX__
-#include <linux/radix-tree.h>
-
-int set_radix_bit(struct radix_tree_root *radix, unsigned long bit);
-int test_radix_bit(struct radix_tree_root *radix, unsigned long bit);
-int clear_radix_bit(struct radix_tree_root *radix, unsigned long bit);
-int find_first_radix_bit(struct radix_tree_root *radix, unsigned long *retbits,
-			 unsigned long start, int nr);
-
-static inline void init_bit_radix(struct radix_tree_root *radix)
-{
-	INIT_RADIX_TREE(radix, GFP_NOFS);
-}
-#endif