compiler.h
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#ifndef _TOOLS_LINUX_COMPILER_H_
#define _TOOLS_LINUX_COMPILER_H_
#ifndef __always_inline
# define __always_inline inline __attribute__((always_inline))
#endif
#define __user
#ifndef __attribute_const__
# define __attribute_const__
#endif
#ifndef __maybe_unused
# define __maybe_unused __attribute__((unused))
#endif
#ifndef __packed
# define __packed __attribute__((__packed__))
#endif
#ifndef __force
# define __force
#endif
#ifndef __weak
# define __weak __attribute__((weak))
#endif
#ifndef likely
# define likely(x) __builtin_expect(!!(x), 1)
#endif
#ifndef unlikely
# define unlikely(x) __builtin_expect(!!(x), 0)
#endif
#endif /* _TOOLS_LINUX_COMPILER_H */