1 #ifndef __TOOLS_LINUX_KERNEL_H 2 #define __TOOLS_LINUX_KERNEL_H 3 4 #include <stdarg.h> 5 #include <stddef.h> 6 #include <assert.h> 7 #include <linux/compiler.h> 8 9 #ifndef UINT_MAX 10 #define UINT_MAX (~0U) 11 #endif 12 13 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 14 15 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 16 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 17 18 #ifndef offsetof 19 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 20 #endif 21 22 #ifndef container_of 23 /** 24 * container_of - cast a member of a structure out to the containing structure 25 * @ptr: the pointer to the member. 26 * @type: the type of the container struct this is embedded in. 27 * @member: the name of the member within the struct. 28 * 29 */ 30 #define container_of(ptr, type, member) ({ \ 31 const typeof(((type *)0)->member) * __mptr = (ptr); \ 32 (type *)((char *)__mptr - offsetof(type, member)); }) 33 #endif 34 35 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) 36 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) 37 38 #ifndef max 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 #endif 45 46 #ifndef min 47 #define min(x, y) ({ \ 48 typeof(x) _min1 = (x); \ 49 typeof(y) _min2 = (y); \ 50 (void) (&_min1 == &_min2); \ 51 _min1 < _min2 ? _min1 : _min2; }) 52 #endif 53 54 #ifndef roundup 55 #define roundup(x, y) ( \ 56 { \ 57 const typeof(y) __y = y; \ 58 (((x) + (__y - 1)) / __y) * __y; \ 59 } \ 60 ) 61 #endif 62 63 #ifndef BUG_ON 64 #ifdef NDEBUG 65 #define BUG_ON(cond) do { if (cond) {} } while (0) 66 #else 67 #define BUG_ON(cond) assert(!(cond)) 68 #endif 69 #endif 70 71 /* 72 * Both need more care to handle endianness 73 * (Don't use bitmap_copy_le() for now) 74 */ 75 #define cpu_to_le64(x) (x) 76 #define cpu_to_le32(x) (x) 77 78 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 79 int scnprintf(char * buf, size_t size, const char * fmt, ...); 80 81 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) 82 83 /* 84 * This looks more complex than it should be. But we need to 85 * get the type for the ~ right in round_down (it needs to be 86 * as wide as the result!), and we want to evaluate the macro 87 * arguments just once each. 88 */ 89 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 90 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 91 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 92 93 #define current_gfp_context(k) 0 94 #define synchronize_sched() 95 96 #endif 97