tree: https://github.com/frank-w/BPI-R2-4.14 5.14-hdmilarb head: a11fbee1b23c2d5f7c177ced2043eb54c53a5d50 commit: a11fbee1b23c2d5f7c177ced2043eb54c53a5d50 [45/45] iommu: add debug config: arm64-randconfig-s031-20210714 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/frank-w/BPI-R2-4.14/commit/a11fbee1b23c2d5f7c177ced204... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.14-hdmilarb git checkout a11fbee1b23c2d5f7c177ced2043eb54c53a5d50 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/iommu/ 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/iommu/iommu.c:926:9: sparse: sparse: mixing declarations and code vim +929 drivers/iommu/iommu.c 915 916 /** 917 * iommu_group_remove_device - remove a device from it's current group 918 * @dev: device to be removed 919 * 920 * This function is called by an iommu driver to remove the device from 921 * it's current group. This decrements the iommu group reference count. 922 */ 923 void iommu_group_remove_device(struct device *dev) 924 { 925 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 927 struct group_device *tmp_device, *device = NULL; 928 930 //dev_info(dev, "Removing from iommu group %d\n", group->id); 931 932 /* Pre-notify listeners that a device is being removed. */ 933 blocking_notifier_call_chain(&group->notifier, 934 IOMMU_GROUP_NOTIFY_DEL_DEVICE, dev); 935 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 936 mutex_lock(&group->mutex); 937 list_for_each_entry(tmp_device, &group->devices, list) { 938 if (tmp_device->dev == dev) { 939 device = tmp_device; 940 list_del(&device->list); 941 break; 942 } 943 } 944 mutex_unlock(&group->mutex); 945 946 if (!device) 947 return; 948 949 sysfs_remove_link(group->devices_kobj, device->name); 950 sysfs_remove_link(&dev->kobj, "iommu_group"); 951 952 trace_remove_device_from_group(group->id, dev); 953 954 kfree(device->name); 955 kfree(device); 956 dev->iommu_group = NULL; 957 kobject_put(group->devices_kobj); 958 } 959 EXPORT_SYMBOL_GPL(iommu_group_remove_device); 960 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org