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 return div_u64(num, 10); 32} 33 34static 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