__NR_fchmodat2
#ifdef __NR_fchmodat2
__NR_fchmodat2,
__SYSCALL(__NR_fchmodat2, sys_fchmodat2)
case __NR_fchmodat2:
__SYSCALL(__NR_fchmodat2, sys_fchmodat2)
int ret = syscall(__NR_fchmodat2, dfd, filename, mode, flags);