mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 11:32:04 +00:00
3fed40cc97
div_factor{_fine} has been implemented for two times, cleanup it.
And I move them into a independent file named math.h because they are
common math functions.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
|
|
/*
|
|
* Copyright (C) 2012 Fujitsu. All rights reserved.
|
|
* Written by Miao Xie <miaox@cn.fujitsu.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#ifndef __BTRFS_MATH_H
|
|
#define __BTRFS_MATH_H
|
|
|
|
#include <asm/div64.h>
|
|
|
|
static inline u64 div_factor(u64 num, int factor)
|
|
{
|
|
if (factor == 10)
|
|
return num;
|
|
num *= factor;
|
|
do_div(num, 10);
|
|
return num;
|
|
}
|
|
|
|
static inline u64 div_factor_fine(u64 num, int factor)
|
|
{
|
|
if (factor == 100)
|
|
return num;
|
|
num *= factor;
|
|
do_div(num, 100);
|
|
return num;
|
|
}
|
|
|
|
#endif
|