include/linux/kernel.h

1 /* Public domain. */
2
3#ifndef _LINUX_KERNEL_H
4#define _LINUX_KERNEL_H
5
6#include <sys/param.h>
7#include <sys/systm.h>
8#include <sys/stdarg.h>
9#include <sys/malloc.h>
10
11#include <linux/types.h>
12#include <linux/compiler.h>
13#include <linux/bitops.h>
14#include <linux/log2.h>
15#include <linux/linkage.h>
16#include <linux/printk.h>
17#include <linux/typecheck.h>
18#include <linux/container_of.h>
19#include <linux/stddef.h>
20#include <linux/align.h>
21#include <linux/math.h>
22#include <linux/limits.h>
23#include <asm/byteorder.h>
24#include <linux/wordpart.h>
25
26#define swap(a, b) \
27 do { __typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while(0)
28
29#define ARRAY_SIZE nitems
30
31#define scnprintf(str, size, fmt, arg...) snprintf(str, size, fmt, ## arg)
32
33#define min_t(t, a, b) ({ \
34 t __min_a = (a); \
35 t __min_b = (b); \
36 __min_a < __min_b ? __min_a : __min_b; })
37
38#define max_t(t, a, b) ({ \
39 t __max_a = (a); \
40 t __max_b = (b); \
41 __max_a > __max_b ? __max_a : __max_b; })
42
43#define MIN_T(t, a, b) min_t(t, a, b)
44#define MAX_T(t, a, b) max_t(t, a, b)
45
46#define clamp_t(t, x, a, b) min_t(t, max_t(t, x, a), b)
47#define clamp(x, a, b) clamp_t(__typeof(x), x, a, b)
48#define clamp_val(x, a, b) clamp_t(__typeof(x), x, a, b)
49
50#define min(a, b) MIN(a, b)
51#define max(a, b) MAX(a, b)
52#define min3(x, y, z) MIN(x, MIN(y, z))
53#define max3(x, y, z) MAX(x, MAX(y, z))
54
55#define min_not_zero(a, b) (a == 0) ? b : ((b == 0) ? a : min(a, b))
56
57 static inline char *
58 kvasprintf(int flags, const char *fmt, va_list ap)
59{
60 char *buf;
61 size_t len;
62 va_list vl;
63
64 va_copy(vl, ap);
65 len = vsnprintf(NULL, 0, fmt, vl);
66 va_end(vl);
67
68 buf = malloc(len + 1, M_DRM, flags);
69 if (buf) {
70 vsnprintf(buf, len + 1, fmt, ap);
71 }
72
73 return buf;
74}
75
76 static inline char *
77 kasprintf(int flags, const char *fmt, ...)
78{
79 char *buf;
80 va_list ap;
81
82 va_start(ap, fmt);
83 buf = kvasprintf(flags, fmt, ap);
84 va_end(ap);
85
86 return buf;
87}
88
89 static inline int
90 vscnprintf(char *buf, size_t size, const char *fmt, va_list ap)
91{
92 int nc;
93
94 nc = vsnprintf(buf, size, fmt, ap);
95 if (nc > (size - 1))
96 return (size - 1);
97 else
98 return nc;
99}
100
101#define might_sleep() assertwaitok()
102#define might_sleep_if(x) do { \
103 if (x) \
104 assertwaitok(); \
105} while (0)
106#define might_fault()
107
108#define add_taint(x, y)
109#define TAINT_MACHINE_CHECK 0
110#define TAINT_WARN 1
111#define LOCKDEP_STILL_OK 0
112
113#define u64_to_user_ptr(x) ((void *)(uintptr_t)(x))
114
115#define _RET_IP_ __builtin_return_address(0)
116#define _THIS_IP_ 0
117
118#define STUB() do { printf("%s: stub\n", __func__); } while(0)
119
120#define PTR_IF(c, p) ((c) ? (p) : NULL)
121
122#endif
123