tree: https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git vsp1/v3u head: c00301e00101f8cd90d76993f64aebfa455e6a64 commit: a7855d04bec709973dec7090e4af6b452ad554bd [43/44] drm: rcar-du: Add R-Car DSI driver config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 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/kbingham/rcar.git/commit/?id=a7855d04bec709973dec7090e4af6b452ad554bd git remote add rcar https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git git fetch --no-tags rcar vsp1/v3u git checkout a7855d04bec709973dec7090e4af6b452ad554bd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:98:2: warning: this decimal constant is unsigned only in ISO C90 98 | {2100000000, 0x41}, {2150000000, 0x42}, {2200000000, 0x43}, | ^ >> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:98:2: warning: this decimal constant is unsigned only in ISO C90 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:99:2: warning: this decimal constant is unsigned only in ISO C90 99 | {2250000000, 0x44}, {2300000000, 0x45}, {2350000000, 0x46}, | ^ drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:99:2: warning: this decimal constant is unsigned only in ISO C90 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:99:2: warning: this decimal constant is unsigned only in ISO C90 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:100:2: warning: this decimal constant is unsigned only in ISO C90 100 | {2400000000, 0x47}, {2450000000, 0x48}, {2500000000, 0x49}, | ^ drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:100:2: warning: this decimal constant is unsigned only in ISO C90 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:100:2: warning: this decimal constant is unsigned only in ISO C90 vim +98 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c 78 79 static const u32 hsfreqrange_table[][2] = { 80 {80000000, 0x00}, {90000000, 0x10}, {100000000, 0x20}, 81 {110000000, 0x30}, {120000000, 0x01}, {130000000, 0x11}, 82 {140000000, 0x21}, {150000000, 0x31}, {160000000, 0x02}, 83 {170000000, 0x12}, {180000000, 0x22}, {190000000, 0x32}, 84 {205000000, 0x03}, {220000000, 0x13}, {235000000, 0x23}, 85 {250000000, 0x33}, {275000000, 0x04}, {300000000, 0x14}, 86 {325000000, 0x25}, {350000000, 0x35}, {400000000, 0x05}, 87 {450000000, 0x16}, {500000000, 0x26}, {550000000, 0x37}, 88 {600000000, 0x07}, {650000000, 0x18}, {700000000, 0x28}, 89 {750000000, 0x39}, {800000000, 0x09}, {850000000, 0x19}, 90 {900000000, 0x29}, {950000000, 0x3a}, {1000000000, 0x0a}, 91 {1050000000, 0x1a}, {1100000000, 0x2a}, {1150000000, 0x3b}, 92 {1200000000, 0x0b}, {1250000000, 0x1b}, {1300000000, 0x2b}, 93 {1350000000, 0x3c}, {1400000000, 0x0c}, {1450000000, 0x1c}, 94 {1500000000, 0x2c}, {1550000000, 0x3d}, {1600000000, 0x0d}, 95 {1650000000, 0x1d}, {1700000000, 0x2e}, {1750000000, 0x3e}, 96 {1800000000, 0x0e}, {1850000000, 0x1e}, {1900000000, 0x2f}, 97 {1950000000, 0x3f}, {2000000000, 0x0f}, {2050000000, 0x40}, > 98 {2100000000, 0x41}, {2150000000, 0x42}, {2200000000, 0x43}, 99 {2250000000, 0x44}, {2300000000, 0x45}, {2350000000, 0x46}, 100 {2400000000, 0x47}, {2450000000, 0x48}, {2500000000, 0x49}, 101 { /* sentinel */ }, 102 }; 103 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org