Hi Karthik, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 5.4/preempt-rt head: 36a2ba81b7c7178b0612363a1af6f22887905cc6 commit: 6e9c23a32b60ca1e35e154e8d857c73b3c313734 [17782/19040] driver: platform: x86: ISI: [Hstd] Host STL Linux Driver for EHL FuSa config: i386-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/intel/linux-intel-lts/commit/6e9c23a32b60ca1e35e154e8d... git remote add intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-lts 5.4/preempt-rt git checkout 6e9c23a32b60ca1e35e154e8d857c73b3c313734 # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): In file included from include/linux/bitops.h:5, from include/linux/kernel.h:12, from include/linux/list.h:9, from include/linux/module.h:9, from drivers/platform/x86/intel_isi_hstd.c:8: drivers/platform/x86/intel_isi_hstd.c: In function 'global_ctrl_check': include/linux/bits.h:8:26: warning: left shift count >= width of type [-Wshift-count-overflow] 8 | #define BIT(nr) (UL(1) << (nr)) | ^~ drivers/platform/x86/intel_isi_hstd.c:138:26: note: in expansion of macro 'BIT' 138 | uint64_t m = ~(BIT(0) | BIT(33)); | ^~~ drivers/platform/x86/intel_isi_hstd.c: In function 'global_ovfctrl_check': include/linux/bits.h:8:26: warning: left shift count >= width of type [-Wshift-count-overflow] 8 | #define BIT(nr) (UL(1) << (nr)) | ^~ drivers/platform/x86/intel_isi_hstd.c:155:26: note: in expansion of macro 'BIT' 155 | uint64_t m = ~(BIT(0) | BIT(33)); | ^~~ include/linux/bits.h:8:26: warning: left shift count >= width of type [-Wshift-count-overflow] 8 | #define BIT(nr) (UL(1) << (nr)) | ^~ drivers/platform/x86/intel_isi_hstd.c:162:29: note: in expansion of macro 'BIT' 162 | if (!(v & BIT(0)) || !(v & BIT(33))) | ^~~ drivers/platform/x86/intel_isi_hstd.c: At top level: 572 | int hstd_init(void) | ^~~~~~~~~ vim +/hstd_init +572 drivers/platform/x86/intel_isi_hstd.c 571 573 { 574 int err = 0; 575 576 hstd_major_num = register_chrdev(0, DEVICE_NAME, &fops); 577 if (hstd_major_num < 0) 578 return hstd_major_num; 579 580 hstd_class = class_create(THIS_MODULE, CLASS_NAME); 581 if (IS_ERR(hstd_class)) { 582 err = PTR_ERR(hstd_class); 583 goto out_chrdev; 584 } 585 586 hstd_dev = device_create(hstd_class, NULL, 587 MKDEV(hstd_major_num, 0), NULL, DEVICE_NAME); 588 if (IS_ERR(hstd_dev)) { 589 err = PTR_ERR(hstd_dev); 590 goto out_class; 591 } 592 err = do_init(); 593 if (err) 594 goto out_init; 595 596 pr_info(PFX "Module version %s successfuly initilized\n", DRV_VERSION); 597 return 0; 598 599 out_init: 600 device_destroy(hstd_class, MKDEV(hstd_major_num, 0)); 601 out_class: 602 class_destroy(hstd_class); 603 out_chrdev: 604 unregister_chrdev(hstd_major_num, DEVICE_NAME); 605 return err; 606 } 607 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org