1975 	struct uffdio_api uffdio_api;  in userfaultfd_api()  local
1982 	if (copy_from_user(&uffdio_api, buf, sizeof(uffdio_api)))  in userfaultfd_api()
1984 	features = uffdio_api.features;  in userfaultfd_api()
1986 	if (uffdio_api.api != UFFD_API)  in userfaultfd_api()
1997 	uffdio_api.features = UFFD_API_FEATURES;  in userfaultfd_api()
1999 	uffdio_api.features &=  in userfaultfd_api()
2003 		uffdio_api.features &= ~UFFD_FEATURE_PAGEFAULT_FLAG_WP;  in userfaultfd_api()
2006 		uffdio_api.features &= ~UFFD_FEATURE_WP_HUGETLBFS_SHMEM;  in userfaultfd_api()
2007 		uffdio_api.features &= ~UFFD_FEATURE_WP_UNPOPULATED;  in userfaultfd_api()
2008 		uffdio_api.features &= ~UFFD_FEATURE_WP_ASYNC;  in userfaultfd_api()
2012 	if (features & ~uffdio_api.features)  in userfaultfd_api()
2015 	uffdio_api.ioctls = UFFD_API_IOCTLS;  in userfaultfd_api()
2017 	if (copy_to_user(buf, &uffdio_api, sizeof(uffdio_api)))  in userfaultfd_api()
2030 	memset(&uffdio_api, 0, sizeof(uffdio_api));  in userfaultfd_api()
2031 	if (copy_to_user(buf, &uffdio_api, sizeof(uffdio_api)))  in userfaultfd_api()