Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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