224 	__u64 ucnt = 0;  in eventfd_read()  local
227 	if (iov_iter_count(to) < sizeof(ucnt))  in eventfd_read()
254 	eventfd_ctx_do_read(ctx, &ucnt);  in eventfd_read()
258 	if (unlikely(copy_to_iter(&ucnt, sizeof(ucnt), to) != sizeof(ucnt)))  in eventfd_read()
261 	return sizeof(ucnt);  in eventfd_read()
269 	__u64 ucnt;  in eventfd_write()  local
272 	if (count < sizeof(ucnt))  in eventfd_write()
274 	if (copy_from_user(&ucnt, buf, sizeof(ucnt)))  in eventfd_write()
276 	if (ucnt == ULLONG_MAX)  in eventfd_write()
280 	if (ULLONG_MAX - ctx->count > ucnt)  in eventfd_write()
281 		res = sizeof(ucnt);  in eventfd_write()
286 			if (ULLONG_MAX - ctx->count > ucnt) {  in eventfd_write()
287 				res = sizeof(ucnt);  in eventfd_write()
302 		ctx->count += ucnt;  in eventfd_write()