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 <linux/panic.h> 12 #include <endian.h> 13 #include <byteswap.h> 14 15 #ifndef UINT_MAX 16 #define UINT_MAX (~0U) 17 #endif 18 19 #define _RET_IP_ ((unsigned long)__builtin_return_address(0)) 20 21 #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) 22 #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 23 24 #ifndef offsetof 25 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 26 #endif 27 28 #ifndef container_of 29 /** 30 * container_of - cast a member of a structure out to the containing structure 31 * @ptr: the pointer to the member. 32 * @type: the type of the container struct this is embedded in. 33 * @member: the name of the member within the struct. 34 * 35 */ 36 #define container_of(ptr, type, member) ({ \ 37 const typeof(((type *)0)->member) * __mptr = (ptr); \ 38 (type *)((char *)__mptr - offsetof(type, member)); }) 39 #endif 40 41 #ifndef max 42 #define max(x, y) ({ \ 43 typeof(x) _max1 = (x); \ 44 typeof(y) _max2 = (y); \ 45 (void) (&_max1 == &_max2); \ 46 _max1 > _max2 ? _max1 : _max2; }) 47 #endif 48 49 #ifndef min 50 #define min(x, y) ({ \ 51 typeof(x) _min1 = (x); \ 52 typeof(y) _min2 = (y); \ 53 (void) (&_min1 == &_min2); \ 54 _min1 < _min2 ? _min1 : _min2; }) 55 #endif 56 57 #define max_t(type, x, y) max((type)x, (type)y) 58 #define min_t(type, x, y) min((type)x, (type)y) 59 #define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi) 60 61 #ifndef BUG_ON 62 #ifdef NDEBUG 63 #define BUG_ON(cond) do { if (cond) {} } while (0) 64 #else 65 #define BUG_ON(cond) assert(!(cond)) 66 #endif 67 #endif 68 #define BUG() BUG_ON(1) 69 70 #if __BYTE_ORDER == __BIG_ENDIAN 71 #define cpu_to_le16 bswap_16 72 #define cpu_to_le32 bswap_32 73 #define cpu_to_le64 bswap_64 74 #define le16_to_cpu bswap_16 75 #define le32_to_cpu bswap_32 76 #define le64_to_cpu bswap_64 77 #define cpu_to_be16 78 #define cpu_to_be32 79 #define cpu_to_be64 80 #define be16_to_cpu 81 #define be32_to_cpu 82 #define be64_to_cpu 83 #else 84 #define cpu_to_le16 85 #define cpu_to_le32 86 #define cpu_to_le64 87 #define le16_to_cpu 88 #define le32_to_cpu 89 #define le64_to_cpu 90 #define cpu_to_be16 bswap_16 91 #define cpu_to_be32 bswap_32 92 #define cpu_to_be64 bswap_64 93 #define be16_to_cpu bswap_16 94 #define be32_to_cpu bswap_32 95 #define be64_to_cpu bswap_64 96 #endif 97 98 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 99 int scnprintf(char * buf, size_t size, const char * fmt, ...); 100 int scnprintf_pad(char * buf, size_t size, const char * fmt, ...); 101 102 #ifndef ARRAY_SIZE 103 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) 104 #endif 105 106 #define current_gfp_context(k) 0 107 #define synchronize_rcu() 108 109 #endif 110