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author | Miao Xie <miaox@cn.fujitsu.com> | 2012-09-13 04:51:36 -0600 |
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committer | Josef Bacik <jbacik@fusionio.com> | 2012-12-11 13:31:30 -0500 |
commit | 3fed40cc97f32bebfd34a55364de9b44dcbede59 (patch) | |
tree | e0e991e2d7ff5643c07f2b63395c0d9e744596ba /fs/btrfs/math.h | |
parent | 29594404d7fe73cd80eaa4ee8c43dcc53970c60e (diff) | |
download | linux-stable-3fed40cc97f32bebfd34a55364de9b44dcbede59.tar.gz linux-stable-3fed40cc97f32bebfd34a55364de9b44dcbede59.tar.bz2 linux-stable-3fed40cc97f32bebfd34a55364de9b44dcbede59.zip |
Btrfs: cleanup duplicated division functions
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>
Diffstat (limited to 'fs/btrfs/math.h')
-rw-r--r-- | fs/btrfs/math.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/fs/btrfs/math.h b/fs/btrfs/math.h new file mode 100644 index 000000000000..b7816cefbd13 --- /dev/null +++ b/fs/btrfs/math.h @@ -0,0 +1,44 @@ + +/* + * 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 |