1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __TOOLS_LINUX_KERNEL_H 3 #define __TOOLS_LINUX_KERNEL_H 4 5 #include <stdarg.h> 6 #include <stddef.h> 7 #include <assert.h> 8 #include <linux/build_bug.h> 9 #include <linux/compiler.h> 10 #include <linux/math.h> 11 #include <endian.h> 12 #include <byteswap.h> 13 14 #ifndef UINT_MAX 15 #define UINT_MAX (~0U) 16 #endif 17 18 #define _RET_IP_ ((unsigned long)__builtin_return_address(0)) 19 20 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 21 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 22 23 #ifndef offsetof 24 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 25 #endif 26 27 #ifndef container_of 28 /** 29 * container_of - cast a member of a structure out to the containing structure 30 * @ptr: the pointer to the member. 31 * @type: the type of the container struct this is embedded in. 32 * @member: the name of the member within the struct. 33 * 34 */ 35 #define container_of(ptr, type, member) ({ \ 36 const typeof(((type *)0)->member) * __mptr = (ptr); \ 37 (type *)((char *)__mptr - offsetof(type, member)); }) 38 #endif 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 #define max_t(type, x, y) max((type)x, (type)y) 57 #define min_t(type, x, y) min((type)x, (type)y) 58 #define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi) 59 60 #ifndef BUG_ON 61 #ifdef NDEBUG 62 #define BUG_ON(cond) do { if (cond) {} } while (0) 63 #else 64 #define BUG_ON(cond) assert(!(cond)) 65 #endif 66 #endif 67 #define BUG() BUG_ON(1) 68 69 #if __BYTE_ORDER == __BIG_ENDIAN 70 #define cpu_to_le16 bswap_16 71 #define cpu_to_le32 bswap_32 72 #define cpu_to_le64 bswap_64 73 #define le16_to_cpu bswap_16 74 #define le32_to_cpu bswap_32 75 #define le64_to_cpu bswap_64 76 #define cpu_to_be16 77 #define cpu_to_be32 78 #define cpu_to_be64 79 #define be16_to_cpu 80 #define be32_to_cpu 81 #define be64_to_cpu 82 #else 83 #define cpu_to_le16 84 #define cpu_to_le32 85 #define cpu_to_le64 86 #define le16_to_cpu 87 #define le32_to_cpu 88 #define le64_to_cpu 89 #define cpu_to_be16 bswap_16 90 #define cpu_to_be32 bswap_32 91 #define cpu_to_be64 bswap_64 92 #define be16_to_cpu bswap_16 93 #define be32_to_cpu bswap_32 94 #define be64_to_cpu bswap_64 95 #endif 96 97 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 98 int scnprintf(char * buf, size_t size, const char * fmt, ...); 99 int scnprintf_pad(char * buf, size_t size, const char * fmt, ...); 100 101 #ifndef ARRAY_SIZE 102 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) 103 #endif 104 105 #define current_gfp_context(k) 0 106 #define synchronize_rcu() 107 108 #endif 109