Commit | Line | Data |
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37fbe0a4 WN |
1 | #ifndef __TOOLS_LINUX_KERNEL_H |
2 | #define __TOOLS_LINUX_KERNEL_H | |
43cbcd8a | 3 | |
5a116dd2 | 4 | #include <stdarg.h> |
d0761e37 | 5 | #include <stddef.h> |
5a116dd2 FW |
6 | #include <assert.h> |
7 | ||
8 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) | |
9 | ||
9ac3e487 IT |
10 | #define PERF_ALIGN(x, a) __PERF_ALIGN_MASK(x, (typeof(x))(a)-1) |
11 | #define __PERF_ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) | |
5a116dd2 | 12 | |
43cbcd8a ACM |
13 | #ifndef offsetof |
14 | #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) | |
15 | #endif | |
16 | ||
17 | #ifndef container_of | |
18 | /** | |
19 | * container_of - cast a member of a structure out to the containing structure | |
20 | * @ptr: the pointer to the member. | |
21 | * @type: the type of the container struct this is embedded in. | |
22 | * @member: the name of the member within the struct. | |
23 | * | |
24 | */ | |
25 | #define container_of(ptr, type, member) ({ \ | |
26 | const typeof(((type *)0)->member) * __mptr = (ptr); \ | |
27 | (type *)((char *)__mptr - offsetof(type, member)); }) | |
28 | #endif | |
29 | ||
1967936d ACM |
30 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) |
31 | ||
52d422de ACM |
32 | #ifndef max |
33 | #define max(x, y) ({ \ | |
34 | typeof(x) _max1 = (x); \ | |
35 | typeof(y) _max2 = (y); \ | |
36 | (void) (&_max1 == &_max2); \ | |
37 | _max1 > _max2 ? _max1 : _max2; }) | |
38 | #endif | |
39 | ||
5a116dd2 FW |
40 | #ifndef min |
41 | #define min(x, y) ({ \ | |
42 | typeof(x) _min1 = (x); \ | |
43 | typeof(y) _min2 = (y); \ | |
44 | (void) (&_min1 == &_min2); \ | |
45 | _min1 < _min2 ? _min1 : _min2; }) | |
46 | #endif | |
47 | ||
86d5a70c IT |
48 | #ifndef roundup |
49 | #define roundup(x, y) ( \ | |
50 | { \ | |
51 | const typeof(y) __y = y; \ | |
52 | (((x) + (__y - 1)) / __y) * __y; \ | |
53 | } \ | |
54 | ) | |
55 | #endif | |
56 | ||
5a116dd2 | 57 | #ifndef BUG_ON |
8bf98b89 IT |
58 | #ifdef NDEBUG |
59 | #define BUG_ON(cond) do { if (cond) {} } while (0) | |
60 | #else | |
5a116dd2 FW |
61 | #define BUG_ON(cond) assert(!(cond)) |
62 | #endif | |
8bf98b89 | 63 | #endif |
5a116dd2 FW |
64 | |
65 | /* | |
66 | * Both need more care to handle endianness | |
67 | * (Don't use bitmap_copy_le() for now) | |
68 | */ | |
69 | #define cpu_to_le64(x) (x) | |
70 | #define cpu_to_le32(x) (x) | |
71 | ||
d0761e37 ACM |
72 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args); |
73 | int scnprintf(char * buf, size_t size, const char * fmt, ...); | |
5a116dd2 | 74 | |
339ce005 JO |
75 | /* |
76 | * This looks more complex than it should be. But we need to | |
77 | * get the type for the ~ right in round_down (it needs to be | |
78 | * as wide as the result!), and we want to evaluate the macro | |
79 | * arguments just once each. | |
80 | */ | |
81 | #define __round_mask(x, y) ((__typeof__(x))((y)-1)) | |
82 | #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) | |
83 | #define round_down(x, y) ((x) & ~__round_mask(x, y)) | |
84 | ||
43cbcd8a | 85 | #endif |