Hi Connor,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on fuse/for-next]
[also build test WARNING on linux/master linus/master v5.12 next-20210507]
[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/Connor-Kuehl/virtiofs-Enable-multiple-request-queues/20210508-061611
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git 
for-next
config: microblaze-randconfig-r001-20210507 (attached as .config)
compiler: microblaze-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
        # 
https://github.com/0day-ci/linux/commit/6ffd4543401bc990353404b556d91cce34b017fc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Connor-Kuehl/virtiofs-Enable-multiple-request-queues/20210508-061611
        git checkout 6ffd4543401bc990353404b556d91cce34b017fc
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 
ARCH=microblaze 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All warnings (new ones prefixed by >>):

   fs/fuse/virtio_fs.c: In function 'virtio_fs_wake_pending_and_unlock':
>> fs/fuse/virtio_fs.c:1246:20: warning: variable 'fs' set but not used 
>> [-Wunused-but-set-variable]
    1246 |  struct virtio_fs *fs;
         |                    ^~


vim +/fs +1246 fs/fuse/virtio_fs.c

a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1242  
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1243  static void 
virtio_fs_wake_pending_and_unlock(struct fuse_iqueue *fiq)
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1244  __releases(fiq->lock)
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1245  {
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12 @1246         struct virtio_fs *fs;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1247         struct fuse_req *req;
51fecdd2555b3e Vivek Goyal     2019-10-15  1248         struct virtio_fs_vq 
*fsvq;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1249         int ret;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1250  
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1251         
WARN_ON(list_empty(&fiq->pending));
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1252         req = 
list_last_entry(&fiq->pending, struct fuse_req, list);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1253         clear_bit(FR_PENDING, 
&req->flags);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1254         
list_del_init(&req->list);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1255         
WARN_ON(!list_empty(&fiq->pending));
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1256         spin_unlock(&fiq->lock);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1257  
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1258         fs = fiq->priv;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1259  
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1260         pr_debug("%s: opcode %u 
unique %#llx nodeid %#llx in.len %u out.len %u\n",
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1261                   __func__, 
req->in.h.opcode, req->in.h.unique,
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1262                  
req->in.h.nodeid, req->in.h.len,
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1263                  
fuse_len_args(req->args->out_numargs, req->args->out_args));
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1264  
6ffd4543401bc9 Connor Kuehl    2021-05-07  1265         fsvq = 
this_cpu_read(this_cpu_fsvq);
6ffd4543401bc9 Connor Kuehl    2021-05-07  1266  
a9bfd9dd341756 Vivek Goyal     2019-10-15  1267         ret = 
virtio_fs_enqueue_req(fsvq, req, false);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1268         if (ret < 0) {
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1269                 if (ret == 
-ENOMEM || ret == -ENOSPC) {
a9bfd9dd341756 Vivek Goyal     2019-10-15  1270                         /*
a9bfd9dd341756 Vivek Goyal     2019-10-15  1271                          * 
Virtqueue full. Retry submission from worker
a9bfd9dd341756 Vivek Goyal     2019-10-15  1272                          * 
context as we might be holding fc->bg_lock.
a9bfd9dd341756 Vivek Goyal     2019-10-15  1273                          */
a9bfd9dd341756 Vivek Goyal     2019-10-15  1274                         
spin_lock(&fsvq->lock);
a9bfd9dd341756 Vivek Goyal     2019-10-15  1275                         
list_add_tail(&req->list, &fsvq->queued_reqs);
a9bfd9dd341756 Vivek Goyal     2019-10-15  1276                         
inc_in_flight_req(fsvq);
a9bfd9dd341756 Vivek Goyal     2019-10-15  1277                         
schedule_delayed_work(&fsvq->dispatch_work,
a9bfd9dd341756 Vivek Goyal     2019-10-15  1278                                 
                msecs_to_jiffies(1));
a9bfd9dd341756 Vivek Goyal     2019-10-15  1279                         
spin_unlock(&fsvq->lock);
a9bfd9dd341756 Vivek Goyal     2019-10-15  1280                         return;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1281                 }
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1282                 
req->out.h.error = ret;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1283                 
pr_err("virtio-fs: virtio_fs_enqueue_req() failed %d\n", ret);
51fecdd2555b3e Vivek Goyal     2019-10-15  1284  
51fecdd2555b3e Vivek Goyal     2019-10-15  1285                 /* Can't end 
request in submission context. Use a worker */
51fecdd2555b3e Vivek Goyal     2019-10-15  1286                 
spin_lock(&fsvq->lock);
51fecdd2555b3e Vivek Goyal     2019-10-15  1287                 
list_add_tail(&req->list, &fsvq->end_reqs);
51fecdd2555b3e Vivek Goyal     2019-10-15  1288                 
schedule_delayed_work(&fsvq->dispatch_work, 0);
51fecdd2555b3e Vivek Goyal     2019-10-15  1289                 
spin_unlock(&fsvq->lock);
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1290                 return;
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1291         }
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1292  }
a62a8ef9d97da2 Stefan Hajnoczi 2018-06-12  1293  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org

Attachment: .config.gz
Description: application/gzip

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