Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / btrfs / math.h
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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