__NR_pidfd_getfd
__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
return syscall(__NR_pidfd_getfd, pidfd, fd, flags);
#ifndef __NR_pidfd_getfd
#if __NR_pidfd_getfd == -1