_UFFDIO_API        33 include/uapi/linux/userfaultfd.h 	 (__u64)1 << _UFFDIO_API)
_UFFDIO_API        59 include/uapi/linux/userfaultfd.h #define UFFDIO_API		_IOWR(UFFDIO, _UFFDIO_API,	\