Hi Nick, kernel test robot noticed the following build errors:
[auto build test ERROR on mst-vhost/linux-next] [also build test ERROR on linus/master v6.18-rc3 next-20251027] [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/Nick-Hudson/vhost-add-a-new-ioctl-VHOST_GET_VRING_WORKER_INFO-and-use-in-net-c/20251027-182919 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next patch link: https://lore.kernel.org/r/20251027102644.622305-1-nhudson%40akamai.com patch subject: [PATCH] vhost: add a new ioctl VHOST_GET_VRING_WORKER_INFO and use in net.c config: csky-randconfig-002-20251028 (https://download.01.org/0day-ci/archive/20251028/[email protected]/config) compiler: csky-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251028/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): drivers/vhost/vhost.c: In function 'vhost_dev_ioctl': >> drivers/vhost/vhost.c:2403:17: error: 'worker' undeclared (first use in this >> function) 2403 | worker = rcu_dereference_check(vq->worker, | ^~~~~~ drivers/vhost/vhost.c:2403:17: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/rbtree.h:24, from include/linux/mm_types.h:11, from include/linux/mmzone.h:22, from include/linux/gfp.h:7, from include/linux/mm.h:7, from include/linux/scatterlist.h:8, from include/linux/virtio.h:7, from include/linux/virtio_config.h:7, from include/uapi/linux/vhost_types.h:16, from include/uapi/linux/vhost.h:14, from drivers/vhost/vhost.c:14: >> drivers/vhost/vhost.c:2403:48: error: 'vq' undeclared (first use in this >> function); did you mean 'rq'? 2403 | worker = rcu_dereference_check(vq->worker, | ^~ include/linux/rcupdate.h:532:17: note: in definition of macro '__rcu_dereference_check' 532 | typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \ | ^ drivers/vhost/vhost.c:2403:26: note: in expansion of macro 'rcu_dereference_check' 2403 | worker = rcu_dereference_check(vq->worker, | ^~~~~~~~~~~~~~~~~~~~~ >> drivers/vhost/vhost.c:2404:65: error: 'dev' undeclared (first use in this >> function); did you mean 'cdev'? 2404 | lockdep_is_held(&dev->mutex)); | ^~~ include/linux/rcupdate.h:483:52: note: in definition of macro 'RCU_LOCKDEP_WARN' 483 | #define RCU_LOCKDEP_WARN(c, s) do { } while (0 && (c)) | ^ include/linux/rcupdate.h:680:9: note: in expansion of macro '__rcu_dereference_check' 680 | __rcu_dereference_check((p), __UNIQUE_ID(rcu), \ | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vhost.c:2403:26: note: in expansion of macro 'rcu_dereference_check' 2403 | worker = rcu_dereference_check(vq->worker, | ^~~~~~~~~~~~~~~~~~~~~ drivers/vhost/vhost.c:2404:48: note: in expansion of macro 'lockdep_is_held' 2404 | lockdep_is_held(&dev->mutex)); | ^~~~~~~~~~~~~~~ >> drivers/vhost/vhost.c:2406:25: error: 'ret' undeclared (first use in this >> function); did you mean 'net'? 2406 | ret = -EINVAL; | ^~~ | net >> drivers/vhost/vhost.c:2410:25: error: 'ring_worker_info' undeclared (first >> use in this function); did you mean 'print_worker_info'? 2410 | memset(&ring_worker_info, 0, sizeof(ring_worker_info)); | ^~~~~~~~~~~~~~~~ | print_worker_info >> drivers/vhost/vhost.c:2411:42: error: 'idx' undeclared (first use in this >> function); did you mean 'ida'? 2411 | ring_worker_info.index = idx; | ^~~ | ida >> drivers/vhost/vhost.c:2413:60: error: implicit declaration of function >> 'vhost_get_task'; did you mean 'vhost_get_desc'? >> [-Wimplicit-function-declaration] 2413 | ring_worker_info.worker_pid = task_pid_vnr(vhost_get_task(worker->vtsk)); | ^~~~~~~~~~~~~~ | vhost_get_desc vim +/worker +2403 drivers/vhost/vhost.c 2352 2353 /* You must be the owner to do anything else */ 2354 r = vhost_dev_check_owner(d); 2355 if (r) 2356 goto done; 2357 2358 switch (ioctl) { 2359 case VHOST_SET_MEM_TABLE: 2360 r = vhost_set_memory(d, argp); 2361 break; 2362 case VHOST_SET_LOG_BASE: 2363 if (copy_from_user(&p, argp, sizeof p)) { 2364 r = -EFAULT; 2365 break; 2366 } 2367 if ((u64)(unsigned long)p != p) { 2368 r = -EFAULT; 2369 break; 2370 } 2371 for (i = 0; i < d->nvqs; ++i) { 2372 struct vhost_virtqueue *vq; 2373 void __user *base = (void __user *)(unsigned long)p; 2374 vq = d->vqs[i]; 2375 mutex_lock(&vq->mutex); 2376 /* If ring is inactive, will check when it's enabled. */ 2377 if (vq->private_data && !vq_log_access_ok(vq, base)) 2378 r = -EFAULT; 2379 else 2380 vq->log_base = base; 2381 mutex_unlock(&vq->mutex); 2382 } 2383 break; 2384 case VHOST_SET_LOG_FD: 2385 r = get_user(fd, (int __user *)argp); 2386 if (r < 0) 2387 break; 2388 ctx = fd == VHOST_FILE_UNBIND ? NULL : eventfd_ctx_fdget(fd); 2389 if (IS_ERR(ctx)) { 2390 r = PTR_ERR(ctx); 2391 break; 2392 } 2393 swap(ctx, d->log_ctx); 2394 for (i = 0; i < d->nvqs; ++i) { 2395 mutex_lock(&d->vqs[i]->mutex); 2396 d->vqs[i]->log_ctx = d->log_ctx; 2397 mutex_unlock(&d->vqs[i]->mutex); 2398 } 2399 if (ctx) 2400 eventfd_ctx_put(ctx); 2401 break; 2402 case VHOST_GET_VRING_WORKER_INFO: > 2403 worker = rcu_dereference_check(vq->worker, > 2404 > lockdep_is_held(&dev->mutex)); 2405 if (!worker) { > 2406 ret = -EINVAL; 2407 break; 2408 } 2409 > 2410 memset(&ring_worker_info, 0, sizeof(ring_worker_info)); > 2411 ring_worker_info.index = idx; 2412 ring_worker_info.worker_id = worker->id; > 2413 ring_worker_info.worker_pid = > task_pid_vnr(vhost_get_task(worker->vtsk)); 2414 2415 if (copy_to_user(argp, &ring_worker_info, sizeof(ring_worker_info))) 2416 ret = -EFAULT; 2417 break; 2418 default: 2419 r = -ENOIOCTLCMD; 2420 break; 2421 } 2422 done: 2423 return r; 2424 } 2425 EXPORT_SYMBOL_GPL(vhost_dev_ioctl); 2426 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
