Messages in this thread | | | Date | Sat, 4 Jun 2022 17:09:40 +0800 | From | kernel test robot <> | Subject | drivers/vhost/vringh.c:586:18: sparse: sparse: restricted __virtio16 degrades to integer |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 032dcf09e2bf7c822be25b4abef7a6c913870d98 commit: a97b693c3712f040c5802f32b2d685352e08cefa uaccess: fix nios2 and microblaze get_user_8() date: 3 months ago config: microblaze-randconfig-s031-20220603 (https://download.01.org/0day-ci/archive/20220604/202206041728.NyW4skUB-lkp@intel.com/config) compiler: microblaze-linux-gcc (GCC) 11.3.0 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: v0.6.4-18-g56afb504-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a97b693c3712f040c5802f32b2d685352e08cefa git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout a97b693c3712f040c5802f32b2d685352e08cefa # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=microblaze SHELL=/bin/bash drivers/vhost/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>) >> drivers/vhost/vringh.c:586:18: sparse: sparse: restricted __virtio16 degrades to integer >> drivers/vhost/vringh.c:586:18: sparse: sparse: restricted __virtio16 degrades to integer drivers/vhost/vringh.c:586:18: sparse: sparse: cast to restricted __virtio16
vim +586 drivers/vhost/vringh.c
f87d0fbb579818 Rusty Russell 2013-03-20 581 f87d0fbb579818 Rusty Russell 2013-03-20 582 /* Userspace access helpers: in this case, addresses are really userspace. */ b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 583 static inline int getu16_user(const struct vringh *vrh, u16 *val, const __virtio16 *p) f87d0fbb579818 Rusty Russell 2013-03-20 584 { b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 585 __virtio16 v = 0; b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 @586 int rc = get_user(v, (__force __virtio16 __user *)p); b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 587 *val = vringh16_to_cpu(vrh, v); b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 588 return rc; f87d0fbb579818 Rusty Russell 2013-03-20 589 } f87d0fbb579818 Rusty Russell 2013-03-20 590
:::::: The code at line 586 was first introduced by commit :::::: b9f7ac8c72894c19bf258a54ecaa708df4ffbe80 vringh: update for virtio 1.0 APIs
:::::: TO: Michael S. Tsirkin <mst@redhat.com> :::::: CC: Michael S. Tsirkin <mst@redhat.com>
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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