1 2 #ifndef KVM__LINUX_KERNEL_H_ 3 #define KVM__LINUX_KERNEL_H_ 4 5 #include "asm/kernel.h" 6 7 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 8 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 9 10 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 11 12 #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) 13 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) 14 #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) 15 16 #ifndef offsetof 17 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 18 #endif 19 20 #ifndef container_of 21 /** 22 * container_of - cast a member of a structure out to the containing structure 23 * @ptr: the pointer to the member. 24 * @type: the type of the container struct this is embedded in. 25 * @member: the name of the member within the struct. 26 * 27 */ 28 #define container_of(ptr, type, member) ({ \ 29 const typeof(((type *)0)->member) * __mptr = (ptr); \ 30 (type *)((char *)__mptr - offsetof(type, member)); }) 31 #endif 32 33 #define min(x, y) ({ \ 34 typeof(x) _min1 = (x); \ 35 typeof(y) _min2 = (y); \ 36 (void) (&_min1 == &_min2); \ 37 _min1 < _min2 ? _min1 : _min2; }) 38 39 #define max(x, y) ({ \ 40 typeof(x) _max1 = (x); \ 41 typeof(y) _max2 = (y); \ 42 (void) (&_max1 == &_max2); \ 43 _max1 > _max2 ? _max1 : _max2; }) 44 45 #define min_t(type, x, y) ({ \ 46 type __min1 = (x); \ 47 type __min2 = (y); \ 48 __min1 < __min2 ? __min1: __min2; }) 49 50 #define max_t(type, x, y) ({ \ 51 type __max1 = (x); \ 52 type __max2 = (y); \ 53 __max1 > __max2 ? __max1: __max2; }) 54 55 #define true 1 56 57 #endif 58