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