[kbuild-all] drivers/vhost/vhost.c:1035:16: sparse: sparse: restricted __virtio16 degrades to integer

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9a73fa375d58fee5262dd16473c8e7522bdf44de commit: d877322bc1adcab9850732275670409e8bcca4c4 openrisc: Fix issue with get_user for 64-bit values date: 11 months ago config: openrisc-randconfig-s031-20210810 (attached as .config) compiler: or1k-linux-gcc (GCC) 10.3.0 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: v0.6.3-348-gf0e6938b-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d877322bc1adcab9850732275670409e8bcca4c4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=openrisc SHELL=/bin/bash drivers/vhost/ 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/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1035:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1010:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1010:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1016:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1016:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1016:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1023:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1023:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1023:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1029:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1029:16: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1029:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vhost.c:1010:16: sparse: sparse: cast to restricted __virtio16 vim +1035 drivers/vhost/vhost.c 7b5d753ebc22c5 Jason Wang 2019-05-24 1031 7b5d753ebc22c5 Jason Wang 2019-05-24 1032 static inline int vhost_get_used_idx(struct vhost_virtqueue *vq, 7b5d753ebc22c5 Jason Wang 2019-05-24 1033 __virtio16 *idx) 7b5d753ebc22c5 Jason Wang 2019-05-24 1034 { 7b5d753ebc22c5 Jason Wang 2019-05-24 @1035 return vhost_get_used(vq, *idx, &vq->used->idx); 7b5d753ebc22c5 Jason Wang 2019-05-24 1036 } 7b5d753ebc22c5 Jason Wang 2019-05-24 1037 :::::: The code at line 1035 was first introduced by commit :::::: 7b5d753ebc22c5b6935a70ce9a857dc6220784f8 vhost: fine grain userspace memory accessors :::::: TO: Jason Wang <jasowang(a)redhat.com&gt; :::::: CC: Michael S. Tsirkin <mst(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org