tree: https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git preview head: e675fabdbbcdb6e32dba688a20fb0bd42e0e2d5d commit: 9f7f5289523a8cd7746b8aeca9350c87ecdc5747 [42/53] cxl/pci: Implement wait for media active config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220122/202201222041.iNxUcO0N-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git/commit/?id=9f... git remote add cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git git fetch --no-tags cxl preview git checkout 9f7f5289523a8cd7746b8aeca9350c87ecdc5747 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/ 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 >>): u64 size; ^ 1 warning generated. vim +/size +437 drivers/cxl/pci.c 419 420 /* 421 * Wait up to @mbox_ready_timeout for the device to report memory 422 * active. 423 */ 424 static int wait_for_media_ready(struct cxl_dev_state *cxlds) 425 { 426 struct pci_dev *pdev = to_pci_dev(cxlds->dev); 427 int d = cxlds->cxl_dvsec; 428 bool active = false; 429 u64 md_status; 430 int rc, i; 431 432 rc = wait_for_valid(cxlds); 433 if (rc) 434 return rc; 435 436 for (i = mbox_ready_timeout; i; i--) { 438 u32 temp; 439 int rc; 440 441 rc = pci_read_config_dword( 442 pdev, d + CXL_DVSEC_RANGE_SIZE_HIGH(0), &temp); 443 if (rc) 444 return rc; 445 size = (u64)temp << 32; 446 447 rc = pci_read_config_dword( 448 pdev, d + CXL_DVSEC_RANGE_SIZE_LOW(0), &temp); 449 if (rc) 450 return rc; 451 size |= temp & CXL_DVSEC_MEM_SIZE_LOW_MASK; 452 453 active = FIELD_GET(CXL_DVSEC_MEM_ACTIVE, temp); 454 if (active) 455 break; 456 msleep(1); 457 } 458 459 if (!active) { 460 dev_err(&pdev->dev, 461 "timeout awaiting memory active after %d seconds\n", 462 mbox_ready_timeout); 463 return -ETIMEDOUT; 464 } 465 466 md_status = readq(cxlds->regs.memdev + CXLMDEV_STATUS_OFFSET); 467 if (!CXLMDEV_READY(md_status)) 468 return -EIO; 469 470 return 0; 471 } 472 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org