1 2 #ifndef KVM__LINUX_KERNEL_H_ 3 #define KVM__LINUX_KERNEL_H_ 4 5 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 6 7 #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) 8 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) 9 10 #ifndef offsetof 11 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 12 #endif 13 14 #ifndef container_of 15 /** 16 * container_of - cast a member of a structure out to the containing structure 17 * @ptr: the pointer to the member. 18 * @type: the type of the container struct this is embedded in. 19 * @member: the name of the member within the struct. 20 * 21 */ 22 #define container_of(ptr, type, member) ({ \ 23 const typeof(((type *)0)->member) * __mptr = (ptr); \ 24 (type *)((char *)__mptr - offsetof(type, member)); }) 25 #endif 26 27 #define min(x, y) ({ \ 28 typeof(x) _min1 = (x); \ 29 typeof(y) _min2 = (y); \ 30 (void) (&_min1 == &_min2); \ 31 _min1 < _min2 ? _min1 : _min2; }) 32 33 #define max(x, y) ({ \ 34 typeof(x) _max1 = (x); \ 35 typeof(y) _max2 = (y); \ 36 (void) (&_max1 == &_max2); \ 37 _max1 > _max2 ? _max1 : _max2; }) 38 39 #endif 40