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
div_factor(u64 num,int factor)26 static inline u64 div_factor(u64 num, int factor)
27 {
28 if (factor == 10)
29 return num;
30 num *= factor;
31 return div_u64(num, 10);
32 }
33
div_factor_fine(u64 num,int factor)34 static inline u64 div_factor_fine(u64 num, int factor)
35 {
36 if (factor == 100)
37 return num;
38 num *= factor;
39 return div_u64(num, 100);
40 }
41
42 #endif
43