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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526#ifndef _TOOLS_MATH_H#define _TOOLS_MATH_H
/* * This looks more complex than it should be. But we need to * get the type for the ~ right in round_down (it needs to be * as wide as the result!), and we want to evaluate the macro * arguments just once each. */#define __round_mask(x, y) ((__typeof__(x))((y)-1))#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)#define round_down(x, y) ((x) & ~__round_mask(x, y))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#ifndef roundup#define roundup(x, y) ( \{ \ const typeof(y) __y = y; \ (((x) + (__y - 1)) / __y) * __y; \} \)#endif
#endif