Btrfs: remove remaining ref-cache code

Since commit f2a97a9dbd86eb1ef956bdf20e05c507b32beb96
("btrfs: remove all unused functions"), there's no extern functions
at all in ref-cache.c, so just remove the remaining dead code.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/ref-cache.c b/fs/btrfs/ref-cache.c
deleted file mode 100644 (file)
index 82d569c..0000000
--- a/fs/btrfs/ref-cache.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2008 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.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/sort.h>
-#include "ctree.h"
-#include "ref-cache.h"
-#include "transaction.h"
-
-static struct rb_node *tree_insert(struct rb_root *root, u64 bytenr,
-                                  struct rb_node *node)
-{
-       struct rb_node **p = &root->rb_node;
-       struct rb_node *parent = NULL;
-       struct btrfs_leaf_ref *entry;
-
-       while (*p) {
-               parent = *p;
-               entry = rb_entry(parent, struct btrfs_leaf_ref, rb_node);
-
-               if (bytenr < entry->bytenr)
-                       p = &(*p)->rb_left;
-               else if (bytenr > entry->bytenr)
-                       p = &(*p)->rb_right;
-               else
-                       return parent;
-       }
-
-       entry = rb_entry(node, struct btrfs_leaf_ref, rb_node);
-       rb_link_node(node, parent, p);
-       rb_insert_color(node, root);
-       return NULL;
-}
-
-static struct rb_node *tree_search(struct rb_root *root, u64 bytenr)
-{
-       struct rb_node *n = root->rb_node;
-       struct btrfs_leaf_ref *entry;
-
-       while (n) {
-               entry = rb_entry(n, struct btrfs_leaf_ref, rb_node);
-               WARN_ON(!entry->in_tree);
-
-               if (bytenr < entry->bytenr)
-                       n = n->rb_left;
-               else if (bytenr > entry->bytenr)
-                       n = n->rb_right;
-               else
-                       return n;
-       }
-       return NULL;
-}

diff --git a/fs/btrfs/ref-cache.h b/fs/btrfs/ref-cache.h
deleted file mode 100644 (file)
index 24f7001..0000000
--- a/fs/btrfs/ref-cache.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2008 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 __REFCACHE__
-#define __REFCACHE__
-
-struct btrfs_extent_info {
-       /* bytenr and num_bytes find the extent in the extent allocation tree */
-       u64 bytenr;
-       u64 num_bytes;
-
-       /* objectid and offset find the back reference for the file */
-       u64 objectid;
-       u64 offset;
-};
-
-struct btrfs_leaf_ref {
-       struct rb_node rb_node;
-       struct btrfs_leaf_ref_tree *tree;
-       int in_tree;
-       atomic_t usage;
-
-       u64 root_gen;
-       u64 bytenr;
-       u64 owner;
-       u64 generation;
-       int nritems;
-
-       struct list_head list;
-       struct btrfs_extent_info extents[];
-};
-
-static inline size_t btrfs_leaf_ref_size(int nr_extents)
-{
-       return sizeof(struct btrfs_leaf_ref) +
-              sizeof(struct btrfs_extent_info) * nr_extents;
-}
-#endif