[kbuild-all] drivers/vhost/vringh.c:567:18: sparse: sparse: restricted __virtio16 degrades to integer

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 80be5998ad6339e3e804a772723390cb50b96428 commit: d877322bc1adcab9850732275670409e8bcca4c4 openrisc: Fix issue with get_user for 64-bit values date: 1 year ago config: openrisc-randconfig-s032-20210916 (attached as .config) compiler: or1k-linux-gcc (GCC) 11.2.0 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: v0.6.4-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-11.2.0 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/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16 drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16 vim +567 drivers/vhost/vringh.c f87d0fbb579818 Rusty Russell 2013-03-20 562 f87d0fbb579818 Rusty Russell 2013-03-20 563 /* Userspace access helpers: in this case, addresses are really userspace. */ b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 564 static inline int getu16_user(const struct vringh *vrh, u16 *val, const __virtio16 *p) f87d0fbb579818 Rusty Russell 2013-03-20 565 { b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 566 __virtio16 v = 0; b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 @567 int rc = get_user(v, (__force __virtio16 __user *)p); b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 568 *val = vringh16_to_cpu(vrh, v); b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 569 return rc; f87d0fbb579818 Rusty Russell 2013-03-20 570 } f87d0fbb579818 Rusty Russell 2013-03-20 571 :::::: The code at line 567 was first introduced by commit :::::: b9f7ac8c72894c19bf258a54ecaa708df4ffbe80 vringh: update for virtio 1.0 APIs :::::: TO: Michael S. Tsirkin <mst(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