[PATCH 1/4] kernel.h: Implement DIV_ROUND_CLOSEST_ULL

[Jeff Epler]

On Fri, Mar 20, 2015 at 11:14:40AM +0000, Javi Merino wrote:
> +/*
> + * Same as above but for u64 dividends.  divisor must be a 32-bit
> + * number.
> + */
> +#define DIV_ROUND_CLOSEST_ULL(x, divisor)(           \
> +{                                                    \
> +     unsigned long long _tmp = (x) + (divisor) / 2;  \
> +     do_div(_tmp, divisor);                          \
> +     _tmp;                                           \
> +}                                                    \
> +)

The macro evaluates 'divisor' twice.

Jeff