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/compiler.h>
9#include <endian.h>
10#include <byteswap.h>
11
12#ifndef UINT_MAX
13#define UINT_MAX (~0U)
14#endif
15
16#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
39#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
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#ifndef roundup
58#define roundup(x, y) ( \
59{ \
60 const typeof(y) __y = y; \
61 (((x) + (__y - 1)) / __y) * __y; \
62} \
63)
64#endif
65
66#ifndef BUG_ON
67#ifdef NDEBUG
68#define BUG_ON(cond) do { if (cond) {} } while (0)
69#else
70#define BUG_ON(cond) assert(!(cond))
71#endif
72#endif
73#define BUG() BUG_ON(1)
74
75#if __BYTE_ORDER == __BIG_ENDIAN
76#define cpu_to_le16 bswap_16
77#define cpu_to_le32 bswap_32
78#define cpu_to_le64 bswap_64
79#define le16_to_cpu bswap_16
80#define le32_to_cpu bswap_32
81#define le64_to_cpu bswap_64
82#define cpu_to_be16
83#define cpu_to_be32
84#define cpu_to_be64
85#define be16_to_cpu
86#define be32_to_cpu
87#define be64_to_cpu
88#else
89#define cpu_to_le16
90#define cpu_to_le32
91#define cpu_to_le64
92#define le16_to_cpu
93#define le32_to_cpu
94#define le64_to_cpu
95#define cpu_to_be16 bswap_16
96#define cpu_to_be32 bswap_32
97#define cpu_to_be64 bswap_64
98#define be16_to_cpu bswap_16
99#define be32_to_cpu bswap_32
100#define be64_to_cpu bswap_64
101#endif
102
103int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
104int scnprintf(char * buf, size_t size, const char * fmt, ...);
105
106#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
107
108/*
109 * This looks more complex than it should be. But we need to
110 * get the type for the ~ right in round_down (it needs to be
111 * as wide as the result!), and we want to evaluate the macro
112 * arguments just once each.
113 */
114#define __round_mask(x, y) ((__typeof__(x))((y)-1))
115#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
116#define round_down(x, y) ((x) & ~__round_mask(x, y))
117
118#define current_gfp_context(k) 0
119#define synchronize_rcu()
120
121#endif