tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y head: 6940ba1d3944a80020d39cd9cf00530f928979c9 commit: 58c2bef2e443bc8b05737b47ec2ed992529976c7 [3139/9667] usb: cdns3: Add TI specific wrapper driver :::::: branch date: 7 hours ago :::::: commit date: 7 months ago config: x86_64-randconfig-s021-20200914 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-191-g10164920-dirty git checkout 58c2bef2e443bc8b05737b47ec2ed992529976c7 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/usb/cdns3/cdns3-ti.c:56:27: sparse: sparse: dubious one-bit signed bitfield git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-linux-5.4.y git checkout 58c2bef2e443bc8b05737b47ec2ed992529976c7 vim +55 drivers/usb/cdns3/cdns3-ti.c 58c2bef2e443bc Roger Quadros 2020-02-03 46 58c2bef2e443bc Roger Quadros 2020-02-03 47 /* Modestrap modes */ 58c2bef2e443bc Roger Quadros 2020-02-03 48 enum modestrap_mode { USBSS_MODESTRAP_MODE_NONE, 58c2bef2e443bc Roger Quadros 2020-02-03 49 USBSS_MODESTRAP_MODE_HOST, 58c2bef2e443bc Roger Quadros 2020-02-03 50 USBSS_MODESTRAP_MODE_PERIPHERAL}; 58c2bef2e443bc Roger Quadros 2020-02-03 51 58c2bef2e443bc Roger Quadros 2020-02-03 52 struct cdns_ti { 58c2bef2e443bc Roger Quadros 2020-02-03 53 struct device *dev; 58c2bef2e443bc Roger Quadros 2020-02-03 54 void __iomem *usbss; 58c2bef2e443bc Roger Quadros 2020-02-03 @55 int usb2_only:1; 58c2bef2e443bc Roger Quadros 2020-02-03 56 int vbus_divider:1; 58c2bef2e443bc Roger Quadros 2020-02-03 57 struct clk *usb2_refclk; 58c2bef2e443bc Roger Quadros 2020-02-03 58 struct clk *lpm_clk; 58c2bef2e443bc Roger Quadros 2020-02-03 59 }; 58c2bef2e443bc Roger Quadros 2020-02-03 60 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org