Hi Cindy, kernel test robot noticed the following build warnings: [auto build test WARNING on mst-vhost/linux-next] [also build test WARNING on linus/master v6.11-rc7 next-20240910] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Cindy-Lu/vhost-Add-a-new-module_param-for-enable-kthread/20240909-093852 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next patch link: https://lore.kernel.org/r/20240909013531.1243525-7-lulu%40redhat.com patch subject: [PATCH v1 6/7] vhost: Add kthread support in function vhost_worker_create config: arc-randconfig-001-20240911 (https://download.01.org/0day-ci/archive/20240911/202409112050.3zbvpbyT-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240911/202409112050.3zbvpbyT-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202409112050.3zbvpbyT-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/vhost/vhost.c: In function 'vhost_worker_queue': drivers/vhost/vhost.c:273:13: error: 'use_kthread' undeclared (first use in this function) 273 | if (use_kthread) { | ^~~~~~~~~~~ drivers/vhost/vhost.c:273:13: note: each undeclared identifier is reported only once for each function it appears in drivers/vhost/vhost.c: In function 'vhost_workers_free': drivers/vhost/vhost.c:805:13: error: 'use_kthread' undeclared (first use in this function) 805 | if (use_kthread) | ^~~~~~~~~~~ drivers/vhost/vhost.c: In function 'vhost_worker_create': drivers/vhost/vhost.c:986:13: error: 'use_kthread' undeclared (first use in this function) 986 | if (use_kthread) | ^~~~~~~~~~~ drivers/vhost/vhost.c: In function 'vhost_free_worker': drivers/vhost/vhost.c:1030:13: error: 'use_kthread' undeclared (first use in this function) 1030 | if (use_kthread) | ^~~~~~~~~~~ drivers/vhost/vhost.c: In function 'vhost_worker_create': >> drivers/vhost/vhost.c:990:1: warning: control reaches end of non-void function [-Wreturn-type] 990 | } | ^ vim +990 drivers/vhost/vhost.c 983 984 static struct vhost_worker *vhost_worker_create(struct vhost_dev *dev) 985 { 986 if (use_kthread) 987 return vhost_worker_create_kthread(dev); 988 else 989 return vhost_worker_create_task(dev); > 990 } 991 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
