218 	__u64 ucnt = 0;  in eventfd_read()  local
220 	if (iov_iter_count(to) < sizeof(ucnt))  in eventfd_read()
235 	eventfd_ctx_do_read(ctx, &ucnt);  in eventfd_read()
241 	if (unlikely(copy_to_iter(&ucnt, sizeof(ucnt), to) != sizeof(ucnt)))  in eventfd_read()
244 	return sizeof(ucnt);  in eventfd_read()
252 	__u64 ucnt;  in eventfd_write()  local
254 	if (count != sizeof(ucnt))  in eventfd_write()
256 	if (copy_from_user(&ucnt, buf, sizeof(ucnt)))  in eventfd_write()
258 	if (ucnt == ULLONG_MAX)  in eventfd_write()
262 	if (ULLONG_MAX - ctx->count > ucnt)  in eventfd_write()
263 		res = sizeof(ucnt);  in eventfd_write()
266 				ULLONG_MAX - ctx->count > ucnt);  in eventfd_write()
268 			res = sizeof(ucnt);  in eventfd_write()
271 		ctx->count += ucnt;  in eventfd_write()