_UFFDIO_REGISTER   31 include/uapi/linux/userfaultfd.h 	((__u64)1 << _UFFDIO_REGISTER |		\
_UFFDIO_REGISTER   61 include/uapi/linux/userfaultfd.h #define UFFDIO_REGISTER		_IOWR(UFFDIO, _UFFDIO_REGISTER, \