On Fri, Sep 28, 2012 at 09:49:13AM +0800, Miao Xie wrote:
> diff --git a/fs/btrfs/math.h b/fs/btrfs/math.h
> new file mode 100644
> index 0000000..4fef49f
> --- /dev/null
> +++ b/fs/btrfs/math.h
> @@ -0,0 +1,35 @@
> +
> +/*
> + * Copyright (C) 2012 Fujitsu. All rights reserved.
> + * Written by Miao Xie <mi...@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)
> +{
> + WARN_ON(factor > 100 || factor < 0);
> +
> + num *= factor;
> + do_div(num, 100);
> + return num;
> +}
> +
> +#endif
Sorry no, a 4 line function does not deserve a separate file.
david
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