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 #include <endian.h> 9 #include <byteswap.h> 10 11 #ifndef UINT_MAX 12 #define UINT_MAX (~0U) 13 #endif 14 15 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 16 17 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 18 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 19 20 #ifndef offsetof 21 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 22 #endif 23 24 #ifndef container_of 25 /** 26 * container_of - cast a member of a structure out to the containing structure 27 * @ptr: the pointer to the member. 28 * @type: the type of the container struct this is embedded in. 29 * @member: the name of the member within the struct. 30 * 31 */ 32 #define container_of(ptr, type, member) ({ \ 33 const typeof(((type *)0)->member) * __mptr = (ptr); \ 34 (type *)((char *)__mptr - offsetof(type, member)); }) 35 #endif 36 37 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) 38 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) 39 40 #ifndef max 41 #define max(x, y) ({ \ 42 typeof(x) _max1 = (x); \ 43 typeof(y) _max2 = (y); \ 44 (void) (&_max1 == &_max2); \ 45 _max1 > _max2 ? _max1 : _max2; }) 46 #endif 47 48 #ifndef min 49 #define min(x, y) ({ \ 50 typeof(x) _min1 = (x); \ 51 typeof(y) _min2 = (y); \ 52 (void) (&_min1 == &_min2); \ 53 _min1 < _min2 ? _min1 : _min2; }) 54 #endif 55 56 #ifndef roundup 57 #define roundup(x, y) ( \ 58 { \ 59 const typeof(y) __y = y; \ 60 (((x) + (__y - 1)) / __y) * __y; \ 61 } \ 62 ) 63 #endif 64 65 #ifndef BUG_ON 66 #ifdef NDEBUG 67 #define BUG_ON(cond) do { if (cond) {} } while (0) 68 #else 69 #define BUG_ON(cond) assert(!(cond)) 70 #endif 71 #endif 72 73 #if __BYTE_ORDER == __BIG_ENDIAN 74 #define cpu_to_le16 bswap_16 75 #define cpu_to_le32 bswap_32 76 #define cpu_to_le64 bswap_64 77 #define le16_to_cpu bswap_16 78 #define le32_to_cpu bswap_32 79 #define le64_to_cpu bswap_64 80 #define cpu_to_be16 81 #define cpu_to_be32 82 #define cpu_to_be64 83 #define be16_to_cpu 84 #define be32_to_cpu 85 #define be64_to_cpu 86 #else 87 #define cpu_to_le16 88 #define cpu_to_le32 89 #define cpu_to_le64 90 #define le16_to_cpu 91 #define le32_to_cpu 92 #define le64_to_cpu 93 #define cpu_to_be16 bswap_16 94 #define cpu_to_be32 bswap_32 95 #define cpu_to_be64 bswap_64 96 #define be16_to_cpu bswap_16 97 #define be32_to_cpu bswap_32 98 #define be64_to_cpu bswap_64 99 #endif 100 101 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 102 int scnprintf(char * buf, size_t size, const char * fmt, ...); 103 104 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) 105 106 /* 107 * This looks more complex than it should be. But we need to 108 * get the type for the ~ right in round_down (it needs to be 109 * as wide as the result!), and we want to evaluate the macro 110 * arguments just once each. 111 */ 112 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 113 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 114 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 115 116 #define current_gfp_context(k) 0 117 #define synchronize_sched() 118 119 #endif 120