1
 2/*
 3 * Copyright (C) 2012 Fujitsu.  All rights reserved.
 4 * Written by Miao Xie <miaox@cn.fujitsu.com>
 5 *
 6 * This program is free software; you can redistribute it and/or
 7 * modify it under the terms of the GNU General Public
 8 * License v2 as published by the Free Software Foundation.
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public
16 * License along with this program; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 021110-1307, USA.
19 */
20
21#ifndef __BTRFS_MATH_H
22#define __BTRFS_MATH_H
23
24#include <asm/div64.h>
25
26static inline u64 div_factor(u64 num, int factor)
27{
28	if (factor == 10)
29		return num;
30	num *= factor;
31	do_div(num, 10);
32	return num;
33}
34
35static inline u64 div_factor_fine(u64 num, int factor)
36{
37	if (factor == 100)
38		return num;
39	num *= factor;
40	do_div(num, 100);
41	return num;
42}
43
44#endif