tree: https://github.com/intel/linux-intel-lts.git 5.10/KMB-yocto head: afd0620ed0e5ce91d03f51deb2e551721ba97640 commit: 7dbe73d93ab1bc48db1e01693756d1354b577364 [13/62] misc: xlink-pcie: rh: Add PCIe EP driver for Remote Host config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211211/202112110739.cFgP8oPm-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/linux-intel-lts/commit/7dbe73d93ab1bc48db1e01693... git remote add intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-lts 5.10/KMB-yocto git checkout 7dbe73d93ab1bc48db1e01693756d1354b577364 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/misc/xlink-core/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 1367 | enum xlink_error xlink_write_data_crc(struct xlink_handle *handle, | ^~~~~~~~~~~~~~~~~~~~ 1442 | enum xlink_error xlink_read_data_to_buffer_crc(struct xlink_handle *handle, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1946 | void kmb_xlink_release(struct device *dev) { return; } | ^~~~~~~~~~~~~~~~~ drivers/misc/xlink-core/xlink-core.c: In function 'kmb_xlink_exit': 1971 | int rc, idx; | ^~ -- 124 | struct xlink_event *event_dequeue_buffer(struct event_queue *queue) | ^~~~~~~~~~~~~~~~~~~~ 139 | int event_enqueue_buffer(struct event_queue *queue, struct xlink_event *event) | ^~~~~~~~~~~~~~~~~~~~ 471 | void deinit_buffers(struct event_queue *queue) | ^~~~~~~~~~~~~~ 485 | int init_buffers(struct event_queue *queue) | ^~~~~~~~~~~~ drivers/misc/xlink-core/xlink-dispatcher.c:170:12: warning: 'event_enqueue' defined but not used [-Wunused-function] 170 | static int event_enqueue(struct event_queue *queue, struct xlink_event *event) | ^~~~~~~~~~~~~ vim +/xlink_write_data_crc +1367 drivers/misc/xlink-core/xlink-core.c da8a22c1d117dc Seamus Kelly 2021-02-04 1366 da8a22c1d117dc Seamus Kelly 2021-02-04 @1367 enum xlink_error xlink_write_data_crc(struct xlink_handle *handle, da8a22c1d117dc Seamus Kelly 2021-02-04 1368 uint16_t chan, const uint8_t *message, da8a22c1d117dc Seamus Kelly 2021-02-04 1369 uint32_t size) da8a22c1d117dc Seamus Kelly 2021-02-04 1370 { da8a22c1d117dc Seamus Kelly 2021-02-04 1371 enum xlink_error rc = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1372 /* To be implemented */ da8a22c1d117dc Seamus Kelly 2021-02-04 1373 return rc; da8a22c1d117dc Seamus Kelly 2021-02-04 1374 } da8a22c1d117dc Seamus Kelly 2021-02-04 1375 EXPORT_SYMBOL(xlink_write_data_crc); da8a22c1d117dc Seamus Kelly 2021-02-04 1376 da8a22c1d117dc Seamus Kelly 2021-02-04 1377 enum xlink_error xlink_read_data(struct xlink_handle *handle, da8a22c1d117dc Seamus Kelly 2021-02-04 1378 uint16_t chan, uint8_t **pmessage, uint32_t *size) da8a22c1d117dc Seamus Kelly 2021-02-04 1379 { da8a22c1d117dc Seamus Kelly 2021-02-04 1380 enum xlink_error rc = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1381 struct xlink_link *link = NULL; da8a22c1d117dc Seamus Kelly 2021-02-04 1382 struct xlink_event *event = NULL; da8a22c1d117dc Seamus Kelly 2021-02-04 1383 int event_queued = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1384 da8a22c1d117dc Seamus Kelly 2021-02-04 1385 if (!xlink || !handle) da8a22c1d117dc Seamus Kelly 2021-02-04 1386 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1387 bda567cbcce896 Shashank A P 2021-04-08 1388 trace_xlink_read(handle->sw_device_id, chan, *size); da8a22c1d117dc Seamus Kelly 2021-02-04 1389 link = get_link_by_sw_device_id(handle->sw_device_id); da8a22c1d117dc Seamus Kelly 2021-02-04 1390 if (!link) da8a22c1d117dc Seamus Kelly 2021-02-04 1391 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1392 bda567cbcce896 Shashank A P 2021-04-08 1393 trace_xlink_read_mutex(handle->sw_device_id, chan, *size); da8a22c1d117dc Seamus Kelly 2021-02-04 1394 event = xlink_create_event(link->id, XLINK_READ_REQ, &link->handle, chan, da8a22c1d117dc Seamus Kelly 2021-02-04 1395 *size, 0); bda567cbcce896 Shashank A P 2021-04-08 1396 bda567cbcce896 Shashank A P 2021-04-08 1397 trace_xlink_read_alloc_event(handle->sw_device_id, chan, *size); da8a22c1d117dc Seamus Kelly 2021-02-04 1398 if (!event) da8a22c1d117dc Seamus Kelly 2021-02-04 1399 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1400 da8a22c1d117dc Seamus Kelly 2021-02-04 1401 event->pdata = (void **)pmessage; da8a22c1d117dc Seamus Kelly 2021-02-04 1402 event->length = size; da8a22c1d117dc Seamus Kelly 2021-02-04 1403 rc = xlink_multiplexer_tx(event, &event_queued); da8a22c1d117dc Seamus Kelly 2021-02-04 1404 if (!event_queued) { da8a22c1d117dc Seamus Kelly 2021-02-04 1405 xlink_destroy_event(event); da8a22c1d117dc Seamus Kelly 2021-02-04 1406 } bda567cbcce896 Shashank A P 2021-04-08 1407 trace_xlink_read_data_completion(handle->sw_device_id, chan, *size); da8a22c1d117dc Seamus Kelly 2021-02-04 1408 return rc; da8a22c1d117dc Seamus Kelly 2021-02-04 1409 } da8a22c1d117dc Seamus Kelly 2021-02-04 1410 EXPORT_SYMBOL(xlink_read_data); da8a22c1d117dc Seamus Kelly 2021-02-04 1411 da8a22c1d117dc Seamus Kelly 2021-02-04 1412 enum xlink_error xlink_read_data_to_buffer(struct xlink_handle *handle, da8a22c1d117dc Seamus Kelly 2021-02-04 1413 uint16_t chan, uint8_t * const message, uint32_t *size) da8a22c1d117dc Seamus Kelly 2021-02-04 1414 { da8a22c1d117dc Seamus Kelly 2021-02-04 1415 enum xlink_error rc = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1416 struct xlink_link *link = NULL; da8a22c1d117dc Seamus Kelly 2021-02-04 1417 struct xlink_event *event = NULL; da8a22c1d117dc Seamus Kelly 2021-02-04 1418 int event_queued = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1419 da8a22c1d117dc Seamus Kelly 2021-02-04 1420 if (!xlink || !handle) da8a22c1d117dc Seamus Kelly 2021-02-04 1421 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1422 da8a22c1d117dc Seamus Kelly 2021-02-04 1423 link = get_link_by_sw_device_id(handle->sw_device_id); da8a22c1d117dc Seamus Kelly 2021-02-04 1424 if (!link) da8a22c1d117dc Seamus Kelly 2021-02-04 1425 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1426 da8a22c1d117dc Seamus Kelly 2021-02-04 1427 event = xlink_create_event(link->id, XLINK_READ_TO_BUFFER_REQ, da8a22c1d117dc Seamus Kelly 2021-02-04 1428 &link->handle, chan, *size, 0); da8a22c1d117dc Seamus Kelly 2021-02-04 1429 if (!event) da8a22c1d117dc Seamus Kelly 2021-02-04 1430 return X_LINK_ERROR; da8a22c1d117dc Seamus Kelly 2021-02-04 1431 da8a22c1d117dc Seamus Kelly 2021-02-04 1432 event->data = message; da8a22c1d117dc Seamus Kelly 2021-02-04 1433 event->length = size; da8a22c1d117dc Seamus Kelly 2021-02-04 1434 rc = xlink_multiplexer_tx(event, &event_queued); da8a22c1d117dc Seamus Kelly 2021-02-04 1435 if (!event_queued) { da8a22c1d117dc Seamus Kelly 2021-02-04 1436 xlink_destroy_event(event); da8a22c1d117dc Seamus Kelly 2021-02-04 1437 } da8a22c1d117dc Seamus Kelly 2021-02-04 1438 return rc; da8a22c1d117dc Seamus Kelly 2021-02-04 1439 } da8a22c1d117dc Seamus Kelly 2021-02-04 1440 EXPORT_SYMBOL(xlink_read_data_to_buffer); da8a22c1d117dc Seamus Kelly 2021-02-04 1441 da8a22c1d117dc Seamus Kelly 2021-02-04 @1442 enum xlink_error xlink_read_data_to_buffer_crc(struct xlink_handle *handle, da8a22c1d117dc Seamus Kelly 2021-02-04 1443 uint16_t chan, uint8_t * const message, uint32_t *size) da8a22c1d117dc Seamus Kelly 2021-02-04 1444 { da8a22c1d117dc Seamus Kelly 2021-02-04 1445 enum xlink_error rc = 0; da8a22c1d117dc Seamus Kelly 2021-02-04 1446 /* To be implemented */ da8a22c1d117dc Seamus Kelly 2021-02-04 1447 return rc; da8a22c1d117dc Seamus Kelly 2021-02-04 1448 } da8a22c1d117dc Seamus Kelly 2021-02-04 1449 EXPORT_SYMBOL(xlink_read_data_to_buffer_crc); da8a22c1d117dc Seamus Kelly 2021-02-04 1450 :::::: The code at line 1367 was first introduced by commit :::::: da8a22c1d117dc7a34005542869efd709361b4d9 xlink-core: Add Keem Bay XLink Core Module :::::: TO: Seamus Kelly <seamus.kelly(a)intel.com&gt; :::::: CC: Ranjan Dutta <ranjan.dutta(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org