Hi Xuan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on horms-ipvs/master] [also build test WARNING on linus/master v5.15-rc7 next-20211027] [cannot apply to mst-vhost/linux-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Xuan-Zhuo/virtio-support-cache-indirect-desc/20211027-142025 base: https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs.git master config: i386-randconfig-s002-20211027 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/8935e116c155fb7d484bad35a42b2ca98f75e384 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xuan-Zhuo/virtio-support-cache-indirect-desc/20211027-142025 git checkout 8935e116c155fb7d484bad35a42b2ca98f75e384 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/virtio/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/virtio/virtio_ring.c:438:26: sparse: sparse: cast from restricted __virtio64 >> drivers/virtio/virtio_ring.c:447:28: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __virtio64 [usertype] addr @@ got unsigned long long [usertype] @@ drivers/virtio/virtio_ring.c:447:28: sparse: expected restricted __virtio64 [usertype] addr drivers/virtio/virtio_ring.c:447:28: sparse: got unsigned long long [usertype] drivers/virtio/virtio_ring.c:464:49: sparse: sparse: cast from restricted __virtio64 vim +438 drivers/virtio/virtio_ring.c 431 432 static void desc_cache_chain_free_split(void *chain) 433 { 434 struct vring_desc *desc; 435 436 while (chain) { 437 desc = chain; > 438 chain = (void *)desc->addr; 439 kfree(desc); 440 } 441 } 442 443 static void desc_cache_put_split(struct vring_virtqueue *vq, 444 struct vring_desc *desc, int n) 445 { 446 if (vq->use_desc_cache && n <= VIRT_QUEUE_CACHE_DESC_NUM) { > 447 desc->addr = (u64)vq->desc_cache_chain; 448 vq->desc_cache_chain = desc; 449 } else { 450 kfree(desc); 451 } 452 } 453 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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