kernel.h (2707B)
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 97int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); 98int scnprintf(char * buf, size_t size, const char * fmt, ...); 99int 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