Hi Mike, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on vhost/linux-next] [also build test WARNING on v5.9 next-20201021] [cannot apply to target/for-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/Mike-Christie/vhost-fix-scsi-cmd-handling-and-cgroup-support/20201022-083844 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: x86_64-randconfig-a013-20201021 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ee6abef5323d59b983129bf3514ef6775d1d6cd5) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/6e1629548d318c2c9af7490379a3c9d7e3cba0d5 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mike-Christie/vhost-fix-scsi-cmd-handling-and-cgroup-support/20201022-083844 git checkout 6e1629548d318c2c9af7490379a3c9d7e3cba0d5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/vhost/vsock.c:633:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vsock.c:648:9: note: uninitialized use occurs here return ret; ^~~ drivers/vhost/vsock.c:633:2: note: remove the 'if' if its condition is always false if (vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vsock.c:609:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +633 drivers/vhost/vsock.c 604 605 static int vhost_vsock_dev_open(struct inode *inode, struct file *file) 606 { 607 struct vhost_virtqueue **vqs; 608 struct vhost_vsock *vsock; 609 int ret; 610 611 /* This struct is large and allocation could fail, fall back to vmalloc 612 * if there is no other way. 613 */ 614 vsock = kvmalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL); 615 if (!vsock) 616 return -ENOMEM; 617 618 vqs = kmalloc_array(ARRAY_SIZE(vsock->vqs), sizeof(*vqs), GFP_KERNEL); 619 if (!vqs) { 620 ret = -ENOMEM; 621 goto out; 622 } 623 624 vsock->guest_cid = 0; /* no CID assigned yet */ 625 626 atomic_set(&vsock->queued_replies, 0); 627 628 vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX]; 629 vqs[VSOCK_VQ_RX] = &vsock->vqs[VSOCK_VQ_RX]; 630 vsock->vqs[VSOCK_VQ_TX].handle_kick = vhost_vsock_handle_tx_kick; 631 vsock->vqs[VSOCK_VQ_RX].handle_kick = vhost_vsock_handle_rx_kick; 632 > 633 if (vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs), 634 UIO_MAXIOV, VHOST_VSOCK_PKT_WEIGHT, 635 VHOST_VSOCK_WEIGHT, true, NULL)) 636 goto err_dev_init; 637 638 file->private_data = vsock; 639 spin_lock_init(&vsock->send_pkt_list_lock); 640 INIT_LIST_HEAD(&vsock->send_pkt_list); 641 vhost_work_init(&vsock->send_pkt_work, vhost_transport_send_pkt_work); 642 return 0; 643 644 err_dev_init: 645 kfree(vqs); 646 out: 647 vhost_vsock_free(vsock); 648 return ret; 649 } 650 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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