1 #ifndef PERF_LINUX_KERNEL_H_ 2 #define PERF_LINUX_KERNEL_H_ 3 4 #include <stdarg.h> 5 #include <stdio.h> 6 #include <stdlib.h> 7 #include <assert.h> 8 9 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 10 11 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 12 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 13 14 #ifndef offsetof 15 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 16 #endif 17 18 #ifndef container_of 19 /** 20 * container_of - cast a member of a structure out to the containing structure 21 * @ptr: the pointer to the member. 22 * @type: the type of the container struct this is embedded in. 23 * @member: the name of the member within the struct. 24 * 25 */ 26 #define container_of(ptr, type, member) ({ \ 27 const typeof(((type *)0)->member) * __mptr = (ptr); \ 28 (type *)((char *)__mptr - offsetof(type, member)); }) 29 #endif 30 31 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) 32 33 #ifndef max 34 #define max(x, y) ({ \ 35 typeof(x) _max1 = (x); \ 36 typeof(y) _max2 = (y); \ 37 (void) (&_max1 == &_max2); \ 38 _max1 > _max2 ? _max1 : _max2; }) 39 #endif 40 41 #ifndef min 42 #define min(x, y) ({ \ 43 typeof(x) _min1 = (x); \ 44 typeof(y) _min2 = (y); \ 45 (void) (&_min1 == &_min2); \ 46 _min1 < _min2 ? _min1 : _min2; }) 47 #endif 48 49 #ifndef roundup 50 #define roundup(x, y) ( \ 51 { \ 52 const typeof(y) __y = y; \ 53 (((x) + (__y - 1)) / __y) * __y; \ 54 } \ 55 ) 56 #endif 57 58 #ifndef BUG_ON 59 #ifdef NDEBUG 60 #define BUG_ON(cond) do { if (cond) {} } while (0) 61 #else 62 #define BUG_ON(cond) assert(!(cond)) 63 #endif 64 #endif 65 66 /* 67 * Both need more care to handle endianness 68 * (Don't use bitmap_copy_le() for now) 69 */ 70 #define cpu_to_le64(x) (x) 71 #define cpu_to_le32(x) (x) 72 73 static inline int 74 vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 75 { 76 int i; 77 ssize_t ssize = size; 78 79 i = vsnprintf(buf, size, fmt, args); 80 81 return (i >= ssize) ? (ssize - 1) : i; 82 } 83 84 static inline int scnprintf(char * buf, size_t size, const char * fmt, ...) 85 { 86 va_list args; 87 ssize_t ssize = size; 88 int i; 89 90 va_start(args, fmt); 91 i = vsnprintf(buf, size, fmt, args); 92 va_end(args); 93 94 return (i >= ssize) ? (ssize - 1) : i; 95 } 96 97 static inline unsigned long 98 simple_strtoul(const char *nptr, char **endptr, int base) 99 { 100 return strtoul(nptr, endptr, base); 101 } 102 103 int eprintf(int level, 104 const char *fmt, ...) __attribute__((format(printf, 2, 3))); 105 106 #ifndef pr_fmt 107 #define pr_fmt(fmt) fmt 108 #endif 109 110 #define pr_err(fmt, ...) \ 111 eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) 112 #define pr_warning(fmt, ...) \ 113 eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) 114 #define pr_info(fmt, ...) \ 115 eprintf(0, pr_fmt(fmt), ##__VA_ARGS__) 116 #define pr_debug(fmt, ...) \ 117 eprintf(1, pr_fmt(fmt), ##__VA_ARGS__) 118 #define pr_debugN(n, fmt, ...) \ 119 eprintf(n, pr_fmt(fmt), ##__VA_ARGS__) 120 #define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__) 121 #define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__) 122 #define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__) 123 124 /* 125 * This looks more complex than it should be. But we need to 126 * get the type for the ~ right in round_down (it needs to be 127 * as wide as the result!), and we want to evaluate the macro 128 * arguments just once each. 129 */ 130 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 131 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 132 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 133 134 #endif 135
