__NR_userfaultfd  790 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)
__NR_userfaultfd  756 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)
__NR_userfaultfd  756 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)
__NR_userfaultfd   60 tools/testing/selftests/vm/userfaultfd.c #ifdef __NR_userfaultfd
__NR_userfaultfd  657 tools/testing/selftests/vm/userfaultfd.c 	uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);