/usr/src/linux-headers-5.15.0-190/include/linux
Edit: /usr/src/linux-headers-5.15.0-190/include/linux/const.h (421B)
#ifndef _LINUX_CONST_H
#define _LINUX_CONST_H
#include
/*
* This returns a constant expression while determining if an argument is
* a constant expression, most importantly without evaluating the argument.
* Glory to Martin Uecker
*/
#define __is_constexpr(x) \
(sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
#endif /* _LINUX_CONST_H */