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