Hi Qi, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on linus/master] [also build test ERROR on v5.13-rc6 next-20210616] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Qi-Liu/Add-support-for-Ultrasoc-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/b5544dc3a2731c7be00b04a0d497f892d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Qi-Liu/Add-support-for-Ultrasoc-Trace-Module/20210616-151905 git checkout b5544dc3a2731c7be00b04a0d497f892d56fc6aa # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from drivers/hwtracing/ultrasoc/ultrasoc-smb.c:37: drivers/hwtracing/ultrasoc/ultrasoc-smb.h:172:5: warning: no previous prototype for 'etm_perf_add_symlink_sink' [-Wmissing-prototypes] 172 | int etm_perf_add_symlink_sink(struct coresight_device *csdev) | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hwtracing/ultrasoc/ultrasoc-smb.h:174:6: warning: no previous prototype for 'etm_perf_del_symlink_sink' [-Wmissing-prototypes] 174 | void etm_perf_del_symlink_sink(struct coresight_device *csdev) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hwtracing/ultrasoc/ultrasoc-smb.c: In function 'smb_register_sink': 552 | desc.name = coresight_alloc_device_name(&sink_devs, &pdev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | coresight_claim_device drivers/hwtracing/ultrasoc/ultrasoc-smb.c:552:12: warning: assignment to 'const char *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 552 | desc.name = coresight_alloc_device_name(&sink_devs, &pdev->dev); | ^ cc1: some warnings being treated as errors vim +552 drivers/hwtracing/ultrasoc/ultrasoc-smb.c 533 534 DEFINE_CORESIGHT_DEVLIST(sink_devs, "sink_smb"); 535 static int smb_register_sink(struct platform_device *pdev, 536 struct smb_drv_data *drvdata) 537 { 538 struct coresight_platform_data *pdata = NULL; 539 struct coresight_desc desc = { 0 }; 540 int ret; 541 542 pdata = coresight_get_platform_data(&pdev->dev); 543 if (IS_ERR(pdata)) 544 return PTR_ERR(pdata); 545 546 drvdata->dev->platform_data = pdata; 547 desc.type = CORESIGHT_DEV_TYPE_SINK; 548 desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; 549 desc.ops = &cs_ops; 550 desc.pdata = pdata; 551 desc.dev = &pdev->dev; 553 if (!desc.name) { 554 dev_err(&pdev->dev, "Failed to alloc coresight device name."); 555 return -ENOMEM; 556 } 557 558 drvdata->csdev = coresight_register(&desc); 559 if (IS_ERR(drvdata->csdev)) 560 return PTR_ERR(drvdata->csdev); 561 562 drvdata->miscdev.name = desc.name; 563 drvdata->miscdev.minor = MISC_DYNAMIC_MINOR; 564 drvdata->miscdev.fops = &smb_fops; 565 ret = misc_register(&drvdata->miscdev); 566 if (ret) { 567 coresight_unregister(drvdata->csdev); 568 dev_err(&pdev->dev, "Failed to register misc, ret=%d\n", ret); 569 } 570 571 return ret; 572 } 573 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org