sys_userfaultfd   790 arch/arm64/include/asm/unistd32.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)
sys_userfaultfd   971 include/linux/syscalls.h asmlinkage long sys_userfaultfd(int flags);
sys_userfaultfd   756 include/uapi/asm-generic/unistd.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)
sys_userfaultfd   756 tools/include/uapi/asm-generic/unistd.h __SYSCALL(__NR_userfaultfd, sys_userfaultfd)