Hi Ryder, FYI, the error/warning still remains. tree: https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/g... master head: f8e6dfc64f6135d1b6c5215c14cd30b9b60a0008 commit: 34b877d972bec8cbf397a57393317672cf92996f mt76: mt7915: add thermal cooling device support date: 8 weeks ago config: x86_64-buildonly-randconfig-r001-20210812 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/g... git remote add linus https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/g... git fetch --no-tags linus master git checkout 34b877d972bec8cbf397a57393317672cf92996f # 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 warnings (new ones prefixed by >>): drivers/net/wireless/mediatek/mt76/mt7915/init.c: In function 'mt7915_thermal_init': > > drivers/net/wireless/mediatek/mt76/mt7915/init.c:134:41: warning: > > passing argument 1 of 'thermal_cooling_device_register' discards > > 'const' qualifier from pointer target type [-Wdiscarded- > > qualifiers] 134 | cdev = thermal_cooling_device_register(wiphy_name(wiphy), phy, | ^~~~~~~~~~~~~~~~~ In file included from drivers/net/wireless/mediatek/mt76/mt7915/init.c:7: include/linux/thermal.h:407:39: note: expected 'char *' but argument is of type 'const char *' 407 | thermal_cooling_device_register(char *type, void *devdata, | ~~~~~~^~~~ vim +134 drivers/net/wireless/mediatek/mt76/mt7915/init.c 127 128 static int mt7915_thermal_init(struct mt7915_phy *phy) 129 { 130 struct wiphy *wiphy = phy->mt76->hw->wiphy; 131 struct thermal_cooling_device *cdev; 132 struct device *hwmon; 133 > 134 cdev = thermal_cooling_device_register(wiphy_name(wiphy), phy, 135 &mt7915_ thermal_ops); 136 if (!IS_ERR(cdev)) { 137 if (sysfs_create_link(&wiphy->dev.kobj, &cdev->device.kobj, 138 "cooling_device") < 0) 139 thermal_cooling_device_unregist er(cdev); 140 else 141 phy->cdev = cdev; 142 } 143 144 if (!IS_REACHABLE(CONFIG_HWMON)) 145 return 0; 146 147 hwmon = devm_hwmon_device_register_with_groups(&wiphy->dev, 148 wiphy_name(wiphy), phy, 149 mt7915_hwmon_groups); 150 if (IS_ERR(hwmon)) 151 return PTR_ERR(hwmon); 152 153 return 0; 154 } 155 --- 0-DAY CI Kernel Test Service, Intel Corporation