1045 	struct uffdio_copy uffdio_copy;  in userfaultfd_copy()  local
1046 	struct uffdio_copy __user *user_uffdio_copy;  in userfaultfd_copy()
1049 	user_uffdio_copy = (struct uffdio_copy __user *) arg;  in userfaultfd_copy()
1052 	if (copy_from_user(&uffdio_copy, user_uffdio_copy,  in userfaultfd_copy()
1054 			   sizeof(uffdio_copy)-sizeof(__s64)))  in userfaultfd_copy()
1057 	ret = validate_range(ctx->mm, uffdio_copy.dst, uffdio_copy.len);  in userfaultfd_copy()
1066 	if (uffdio_copy.src + uffdio_copy.len <= uffdio_copy.src)  in userfaultfd_copy()
1068 	if (uffdio_copy.mode & ~UFFDIO_COPY_MODE_DONTWAKE)  in userfaultfd_copy()
1071 	ret = mcopy_atomic(ctx->mm, uffdio_copy.dst, uffdio_copy.src,  in userfaultfd_copy()
1072 			   uffdio_copy.len);  in userfaultfd_copy()
1080 	if (!(uffdio_copy.mode & UFFDIO_COPY_MODE_DONTWAKE)) {  in userfaultfd_copy()
1081 		range.start = uffdio_copy.dst;  in userfaultfd_copy()
1084 	ret = range.len == uffdio_copy.len ? 0 : -EAGAIN;  in userfaultfd_copy()