Hi Zhu, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on vhost/linux-next] [also build test WARNING on v5.7-rc7 next-20200526] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Zhu-Lingshan/vdpa-bypass-waking-up-vhost_woker-for-vdpa-vq-kick/20200526-133819 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: alpha-allyesconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/vhost/vdpa.c:290:6: warning: no previous prototype for 'vhost_vdpa_poll_stop' [-Wmissing-prototypes] 290 | void vhost_vdpa_poll_stop(struct vhost_virtqueue *vq) | ^~~~~~~~~~~~~~~~~~~~ >> drivers/vhost/vdpa.c:295:5: warning: no previous prototype for 'vhost_vdpa_poll_start' [-Wmissing-prototypes] 295 | int vhost_vdpa_poll_start(struct vhost_virtqueue *vq) | ^~~~~~~~~~~~~~~~~~~~~ >> drivers/vhost/vdpa.c:750:6: warning: no previous prototype for 'vhost_vdpa_poll_init' [-Wmissing-prototypes] 750 | void vhost_vdpa_poll_init(struct vhost_dev *dev) | ^~~~~~~~~~~~~~~~~~~~ vim +/vhost_vdpa_poll_stop +290 drivers/vhost/vdpa.c 276 277 static long vhost_vdpa_get_vring_num(struct vhost_vdpa *v, u16 __user *argp) 278 { 279 struct vdpa_device *vdpa = v->vdpa; 280 const struct vdpa_config_ops *ops = vdpa->config; 281 u16 num; 282 283 num = ops->get_vq_num_max(vdpa); 284 285 if (copy_to_user(argp, &num, sizeof(num))) 286 return -EFAULT; 287 288 return 0; 289 } > 290 void vhost_vdpa_poll_stop(struct vhost_virtqueue *vq) 291 { 292 vhost_poll_stop(&vq->poll); 293 } 294 > 295 int vhost_vdpa_poll_start(struct vhost_virtqueue *vq) 296 { 297 struct vhost_poll *poll = &vq->poll; 298 struct file *file = vq->kick; 299 __poll_t mask; 300 301 302 if (poll->wqh) 303 return 0; 304 305 mask = vfs_poll(file, &poll->table); 306 if (mask) 307 vq->handle_kick(&vq->poll.work); 308 if (mask & EPOLLERR) { 309 vhost_poll_stop(poll); 310 return -EINVAL; 311 } 312 313 return 0; 314 } 315 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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