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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
37fbe0a4 WN |
2 | #ifndef __TOOLS_LINUX_KERNEL_H |
3 | #define __TOOLS_LINUX_KERNEL_H | |
43cbcd8a | 4 | |
5a116dd2 | 5 | #include <stdarg.h> |
d0761e37 | 6 | #include <stddef.h> |
5a116dd2 | 7 | #include <assert.h> |
8607c1ee | 8 | #include <linux/compiler.h> |
07fda552 AH |
9 | #include <endian.h> |
10 | #include <byteswap.h> | |
5a116dd2 | 11 | |
eaa75b51 ACM |
12 | #ifndef UINT_MAX |
13 | #define UINT_MAX (~0U) | |
14 | #endif | |
15 | ||
5a116dd2 FW |
16 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
17 | ||
9ac3e487 IT |
18 | #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) |
19 | #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) | |
5a116dd2 | 20 | |
43cbcd8a ACM |
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 | ||
e58e871b | 38 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |
1967936d ACM |
39 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) |
40 | ||
52d422de ACM |
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 | ||
5a116dd2 FW |
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 | ||
86d5a70c IT |
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 | ||
5a116dd2 | 66 | #ifndef BUG_ON |
8bf98b89 IT |
67 | #ifdef NDEBUG |
68 | #define BUG_ON(cond) do { if (cond) {} } while (0) | |
69 | #else | |
5a116dd2 FW |
70 | #define BUG_ON(cond) assert(!(cond)) |
71 | #endif | |
8bf98b89 | 72 | #endif |
5a116dd2 | 73 | |
07fda552 AH |
74 | #if __BYTE_ORDER == __BIG_ENDIAN |
75 | #define cpu_to_le16 bswap_16 | |
76 | #define cpu_to_le32 bswap_32 | |
77 | #define cpu_to_le64 bswap_64 | |
78 | #define le16_to_cpu bswap_16 | |
79 | #define le32_to_cpu bswap_32 | |
80 | #define le64_to_cpu bswap_64 | |
81 | #define cpu_to_be16 | |
82 | #define cpu_to_be32 | |
83 | #define cpu_to_be64 | |
84 | #define be16_to_cpu | |
85 | #define be32_to_cpu | |
86 | #define be64_to_cpu | |
87 | #else | |
88 | #define cpu_to_le16 | |
89 | #define cpu_to_le32 | |
90 | #define cpu_to_le64 | |
91 | #define le16_to_cpu | |
92 | #define le32_to_cpu | |
93 | #define le64_to_cpu | |
94 | #define cpu_to_be16 bswap_16 | |
95 | #define cpu_to_be32 bswap_32 | |
96 | #define cpu_to_be64 bswap_64 | |
97 | #define be16_to_cpu bswap_16 | |
98 | #define be32_to_cpu bswap_32 | |
99 | #define be64_to_cpu bswap_64 | |
100 | #endif | |
5a116dd2 | 101 | |
d0761e37 ACM |
102 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); |
103 | int scnprintf(char * buf, size_t size, const char * fmt, ...); | |
5a116dd2 | 104 | |
8607c1ee ACM |
105 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) |
106 | ||
339ce005 JO |
107 | /* |
108 | * This looks more complex than it should be. But we need to | |
109 | * get the type for the ~ right in round_down (it needs to be | |
110 | * as wide as the result!), and we want to evaluate the macro | |
111 | * arguments just once each. | |
112 | */ | |
113 | #define __round_mask(x, y) ((__typeof__(x))((y)-1)) | |
114 | #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) | |
115 | #define round_down(x, y) ((x) & ~__round_mask(x, y)) | |
116 | ||
e58e871b LASL |
117 | #define current_gfp_context(k) 0 |
118 | #define synchronize_sched() | |
119 | ||
43cbcd8a | 120 | #endif |