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Btrfs: cleanup duplicated division functions 

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 <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Miao Xie 2012-09-13 04:51:36 -06:00 committed by Josef Bacik
parent 29594404d7
commit 3fed40cc97
3 changed files with 46 additions and 40 deletions
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19
fs/btrfs/extent-tree.c
View File

@ -33,6 +33,7 @@
#include "volumes.h"
#include "locking.h"
#include "free-space-cache.h"
#include "math.h"
#undef SCRAMBLE_DELAYED_REFS
@ -649,24 +650,6 @@ 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)
{

44
fs/btrfs/math.h Normal file
View File

@ -0,0 +1,44 @@
/*
* Copyright (C) 2012 Fujitsu. All rights reserved.
* Written by Miao Xie <miaox@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

23
fs/btrfs/volumes.c
View File

@ -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,
@ -2338,18 +2338,6 @@ 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)
{
@ -2514,15 +2502,6 @@ 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;