Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __TOOLS_LINUX_KERNEL_H
2#define __TOOLS_LINUX_KERNEL_H
3
4#include <stdarg.h>
5#include <stddef.h>
6#include <assert.h>
7#include <linux/compiler.h>
8#include <endian.h>
9#include <byteswap.h>
10
11#ifndef UINT_MAX
12#define UINT_MAX (~0U)
13#endif
14
15#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
16
17#define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
18#define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
19
20#ifndef offsetof
21#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
22#endif
23
24#ifndef container_of
25/**
26 * container_of - cast a member of a structure out to the containing structure
27 * @ptr: the pointer to the member.
28 * @type: the type of the container struct this is embedded in.
29 * @member: the name of the member within the struct.
30 *
31 */
32#define container_of(ptr, type, member) ({ \
33 const typeof(((type *)0)->member) * __mptr = (ptr); \
34 (type *)((char *)__mptr - offsetof(type, member)); })
35#endif
36
37#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
38#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
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#ifndef roundup
57#define roundup(x, y) ( \
58{ \
59 const typeof(y) __y = y; \
60 (((x) + (__y - 1)) / __y) * __y; \
61} \
62)
63#endif
64
65#ifndef BUG_ON
66#ifdef NDEBUG
67#define BUG_ON(cond) do { if (cond) {} } while (0)
68#else
69#define BUG_ON(cond) assert(!(cond))
70#endif
71#endif
72
73#if __BYTE_ORDER == __BIG_ENDIAN
74#define cpu_to_le16 bswap_16
75#define cpu_to_le32 bswap_32
76#define cpu_to_le64 bswap_64
77#define le16_to_cpu bswap_16
78#define le32_to_cpu bswap_32
79#define le64_to_cpu bswap_64
80#define cpu_to_be16
81#define cpu_to_be32
82#define cpu_to_be64
83#define be16_to_cpu
84#define be32_to_cpu
85#define be64_to_cpu
86#else
87#define cpu_to_le16
88#define cpu_to_le32
89#define cpu_to_le64
90#define le16_to_cpu
91#define le32_to_cpu
92#define le64_to_cpu
93#define cpu_to_be16 bswap_16
94#define cpu_to_be32 bswap_32
95#define cpu_to_be64 bswap_64
96#define be16_to_cpu bswap_16
97#define be32_to_cpu bswap_32
98#define be64_to_cpu bswap_64
99#endif
100
101int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
102int scnprintf(char * buf, size_t size, const char * fmt, ...);
103
104#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
105
106/*
107 * This looks more complex than it should be. But we need to
108 * get the type for the ~ right in round_down (it needs to be
109 * as wide as the result!), and we want to evaluate the macro
110 * arguments just once each.
111 */
112#define __round_mask(x, y) ((__typeof__(x))((y)-1))
113#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
114#define round_down(x, y) ((x) & ~__round_mask(x, y))
115
116#define current_gfp_context(k) 0
117#define synchronize_sched()
118
119#endif