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_COMPILER_H_
2#define _TOOLS_LINUX_COMPILER_H_
3
4/* Optimization barrier */
5/* The "volatile" is due to gcc bugs */
6#define barrier() __asm__ __volatile__("": : :"memory")
7
8#ifndef __always_inline
9# define __always_inline inline __attribute__((always_inline))
10#endif
11
12#define __user
13
14#ifndef __attribute_const__
15# define __attribute_const__
16#endif
17
18#ifndef __maybe_unused
19# define __maybe_unused __attribute__((unused))
20#endif
21
22#ifndef __packed
23# define __packed __attribute__((__packed__))
24#endif
25
26#ifndef __force
27# define __force
28#endif
29
30#ifndef __weak
31# define __weak __attribute__((weak))
32#endif
33
34#ifndef likely
35# define likely(x) __builtin_expect(!!(x), 1)
36#endif
37
38#ifndef unlikely
39# define unlikely(x) __builtin_expect(!!(x), 0)
40#endif
41
42#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
43
44#endif /* _TOOLS_LINUX_COMPILER_H */