| Miao Xie | 3fed40c | 2012-09-13 04:51:36 -0600 | [diff] [blame^] | 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 | |
| 26 | static 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 | |
| 35 | static 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 |