225 	__u64 ucnt = 0;  in eventfd_read()  local
228 	if (iov_iter_count(to) < sizeof(ucnt))  in eventfd_read()
255 	eventfd_ctx_do_read(ctx, &ucnt);  in eventfd_read()
259 	if (unlikely(copy_to_iter(&ucnt, sizeof(ucnt), to) != sizeof(ucnt)))  in eventfd_read()
262 	return sizeof(ucnt);  in eventfd_read()
270 	__u64 ucnt;  in eventfd_write()  local
273 	if (count < sizeof(ucnt))  in eventfd_write()
275 	if (copy_from_user(&ucnt, buf, sizeof(ucnt)))  in eventfd_write()
277 	if (ucnt == ULLONG_MAX)  in eventfd_write()
281 	if (ULLONG_MAX - ctx->count > ucnt)  in eventfd_write()
282 		res = sizeof(ucnt);  in eventfd_write()
287 			if (ULLONG_MAX - ctx->count > ucnt) {  in eventfd_write()
288 				res = sizeof(ucnt);  in eventfd_write()
303 		ctx->count += ucnt;  in eventfd_write()