137fbe0a4SWang Nan #ifndef __TOOLS_LINUX_KERNEL_H 237fbe0a4SWang Nan #define __TOOLS_LINUX_KERNEL_H 337fbe0a4SWang Nan 437fbe0a4SWang Nan #include <stdarg.h> 5*d0761e37SArnaldo Carvalho de Melo #include <stddef.h> 637fbe0a4SWang Nan #include <assert.h> 737fbe0a4SWang Nan 837fbe0a4SWang Nan #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 937fbe0a4SWang Nan 1037fbe0a4SWang Nan #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 1137fbe0a4SWang Nan #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 1237fbe0a4SWang Nan 1337fbe0a4SWang Nan #ifndef offsetof 1437fbe0a4SWang Nan #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 1537fbe0a4SWang Nan #endif 1637fbe0a4SWang Nan 1737fbe0a4SWang Nan #ifndef container_of 1837fbe0a4SWang Nan /** 1937fbe0a4SWang Nan * container_of - cast a member of a structure out to the containing structure 2037fbe0a4SWang Nan * @ptr: the pointer to the member. 2137fbe0a4SWang Nan * @type: the type of the container struct this is embedded in. 2237fbe0a4SWang Nan * @member: the name of the member within the struct. 2337fbe0a4SWang Nan * 2437fbe0a4SWang Nan */ 2537fbe0a4SWang Nan #define container_of(ptr, type, member) ({ \ 2637fbe0a4SWang Nan const typeof(((type *)0)->member) * __mptr = (ptr); \ 2737fbe0a4SWang Nan (type *)((char *)__mptr - offsetof(type, member)); }) 2837fbe0a4SWang Nan #endif 2937fbe0a4SWang Nan 3037fbe0a4SWang Nan #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) 3137fbe0a4SWang Nan 3237fbe0a4SWang Nan #ifndef max 3337fbe0a4SWang Nan #define max(x, y) ({ \ 3437fbe0a4SWang Nan typeof(x) _max1 = (x); \ 3537fbe0a4SWang Nan typeof(y) _max2 = (y); \ 3637fbe0a4SWang Nan (void) (&_max1 == &_max2); \ 3737fbe0a4SWang Nan _max1 > _max2 ? _max1 : _max2; }) 3837fbe0a4SWang Nan #endif 3937fbe0a4SWang Nan 4037fbe0a4SWang Nan #ifndef min 4137fbe0a4SWang Nan #define min(x, y) ({ \ 4237fbe0a4SWang Nan typeof(x) _min1 = (x); \ 4337fbe0a4SWang Nan typeof(y) _min2 = (y); \ 4437fbe0a4SWang Nan (void) (&_min1 == &_min2); \ 4537fbe0a4SWang Nan _min1 < _min2 ? _min1 : _min2; }) 4637fbe0a4SWang Nan #endif 4737fbe0a4SWang Nan 4837fbe0a4SWang Nan #ifndef roundup 4937fbe0a4SWang Nan #define roundup(x, y) ( \ 5037fbe0a4SWang Nan { \ 5137fbe0a4SWang Nan const typeof(y) __y = y; \ 5237fbe0a4SWang Nan (((x) + (__y - 1)) / __y) * __y; \ 5337fbe0a4SWang Nan } \ 5437fbe0a4SWang Nan ) 5537fbe0a4SWang Nan #endif 5637fbe0a4SWang Nan 5737fbe0a4SWang Nan #ifndef BUG_ON 5837fbe0a4SWang Nan #ifdef NDEBUG 5937fbe0a4SWang Nan #define BUG_ON(cond) do { if (cond) {} } while (0) 6037fbe0a4SWang Nan #else 6137fbe0a4SWang Nan #define BUG_ON(cond) assert(!(cond)) 6237fbe0a4SWang Nan #endif 6337fbe0a4SWang Nan #endif 6437fbe0a4SWang Nan 6537fbe0a4SWang Nan /* 6637fbe0a4SWang Nan * Both need more care to handle endianness 6737fbe0a4SWang Nan * (Don't use bitmap_copy_le() for now) 6837fbe0a4SWang Nan */ 6937fbe0a4SWang Nan #define cpu_to_le64(x) (x) 7037fbe0a4SWang Nan #define cpu_to_le32(x) (x) 7137fbe0a4SWang Nan 72*d0761e37SArnaldo Carvalho de Melo int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 73*d0761e37SArnaldo Carvalho de Melo int scnprintf(char * buf, size_t size, const char * fmt, ...); 7437fbe0a4SWang Nan 7537fbe0a4SWang Nan /* 7637fbe0a4SWang Nan * This looks more complex than it should be. But we need to 7737fbe0a4SWang Nan * get the type for the ~ right in round_down (it needs to be 7837fbe0a4SWang Nan * as wide as the result!), and we want to evaluate the macro 7937fbe0a4SWang Nan * arguments just once each. 8037fbe0a4SWang Nan */ 8137fbe0a4SWang Nan #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 8237fbe0a4SWang Nan #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 8337fbe0a4SWang Nan #define round_down(x, y) ((x) & ~__round_mask(x, y)) 8437fbe0a4SWang Nan 8537fbe0a4SWang Nan #endif 86