div_factor{_fine} has been implemented for two times, cleanup it.
And I move them into a independent file named math.h because they are
common math functions.
Signed-off-by: Miao Xie <mi...@cn.fujitsu.com>
---
fs/btrfs/extent-tree.c | 19 +------------------
fs/btrfs/math.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
fs/btrfs/volumes.c | 23 +----------------------
3 files changed, 46 insertions(+), 40 deletions(-)
create mode 100644 fs/btrfs/math.h
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a010234..5f6bae1 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -33,6 +33,7 @@
#include "volumes.h"
#include "locking.h"
#include "free-space-cache.h"
+#include "math.h"
#undef SCRAMBLE_DELAYED_REFS
@@ -648,24 +649,6 @@ void btrfs_clear_space_info_full(struct btrfs_fs_info
*info)
rcu_read_unlock();
}
-static u64 div_factor(u64 num, int factor)
-{
- if (factor == 10)
- return num;
- num *= factor;
- do_div(num, 10);
- return num;
-}
-
-static u64 div_factor_fine(u64 num, int factor)
-{
- if (factor == 100)
- return num;
- num *= factor;
- do_div(num, 100);
- return num;
-}
-
u64 btrfs_find_block_group(struct btrfs_root *root,
u64 search_start, u64 search_hint, int owner)
{
diff --git a/fs/btrfs/math.h b/fs/btrfs/math.h
new file mode 100644
index 0000000..b7816ce
--- /dev/null
+++ b/fs/btrfs/math.h
@@ -0,0 +1,44 @@
+
+/*
+ * Copyright (C) 2012 Fujitsu. All rights reserved.
+ * Written by Miao Xie <mi...@cn.fujitsu.com>
+ *
+ * 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 __BTRFS_MATH_H
+#define __BTRFS_MATH_H
+
+#include <asm/div64.h>
+
+static inline u64 div_factor(u64 num, int factor)
+{
+ if (factor == 10)
+ return num;
+ num *= factor;
+ do_div(num, 10);
+ return num;
+}
+
+static inline u64 div_factor_fine(u64 num, int factor)
+{
+ if (factor == 100)
+ return num;
+ num *= factor;
+ do_div(num, 100);
+ return num;
+}
+
+#endif
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 3f4e70e..2558fc0 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -25,7 +25,6 @@
#include <linux/capability.h>
#include <linux/ratelimit.h>
#include <linux/kthread.h>
-#include <asm/div64.h>
#include "compat.h"
#include "ctree.h"
#include "extent_map.h"
@@ -36,6 +35,7 @@
#include "async-thread.h"
#include "check-integrity.h"
#include "rcu-string.h"
+#include "math.h"
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@@ -2325,18 +2325,6 @@ static int chunk_profiles_filter(u64 chunk_type,
return 1;
}
-static u64 div_factor_fine(u64 num, int factor)
-{
- if (factor <= 0)
- return 0;
- if (factor >= 100)
- return num;
-
- num *= factor;
- do_div(num, 100);
- return num;
-}
-
static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
@@ -2501,15 +2489,6 @@ static int should_balance_chunk(struct btrfs_root *root,
return 1;
}
-static u64 div_factor(u64 num, int factor)
-{
- if (factor == 10)
- return num;
- num *= factor;
- do_div(num, 10);
- return num;
-}
-
static int __btrfs_balance(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
--
1.7.6.5
--
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