tree:
https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
head: 871997bc9e423f05c7da7c9178e62dde5df2a7f8
commit: 3194a1746e8aabe86075fd3c5e7cf1f4632d7f16 [7/9] xen-netback: don't
"handle" error by BUG()
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-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://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git/commit/?id=31...
git remote add xen-tip
https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
git fetch --no-tags xen-tip linux-next
git checkout 3194a1746e8aabe86075fd3c5e7cf1f4632d7f16
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
drivers/net/xen-netback/netback.c: In function 'xenvif_tx_action':
> drivers/net/xen-netback/netback.c:1334:17: warning: variable
'ret' set but not used [-Wunused-but-set-variable]
1334 | int
work_done, ret;
| ^~~
vim +/ret +1334 drivers/net/xen-netback/netback.c
3e2234b3149f66 Zoltan Kiss 2014-03-06 1328
f53c3fe8dad725 Zoltan Kiss 2014-03-06 1329
f942dc2552b8bf Ian Campbell 2011-03-15 1330 /* Called after netfront has transmitted */
e9ce7cb6b10740 Wei Liu 2014-06-04 1331 int xenvif_tx_action(struct xenvif_queue
*queue, int budget)
f942dc2552b8bf Ian Campbell 2011-03-15 1332 {
bdab82759b8e36 Zoltan Kiss 2014-04-02 1333 unsigned nr_mops, nr_cops = 0;
f53c3fe8dad725 Zoltan Kiss 2014-03-06 @1334 int work_done, ret;
b3f980bd827e6e Wei Liu 2013-08-26 1335
e9ce7cb6b10740 Wei Liu 2014-06-04 1336 if (unlikely(!tx_work_todo(queue)))
b3f980bd827e6e Wei Liu 2013-08-26 1337 return 0;
f942dc2552b8bf Ian Campbell 2011-03-15 1338
e9ce7cb6b10740 Wei Liu 2014-06-04 1339 xenvif_tx_build_gops(queue, budget,
&nr_cops, &nr_mops);
f942dc2552b8bf Ian Campbell 2011-03-15 1340
bdab82759b8e36 Zoltan Kiss 2014-04-02 1341 if (nr_cops == 0)
b3f980bd827e6e Wei Liu 2013-08-26 1342 return 0;
f942dc2552b8bf Ian Campbell 2011-03-15 1343
e9ce7cb6b10740 Wei Liu 2014-06-04 1344 gnttab_batch_copy(queue->tx_copy_ops,
nr_cops);
3194a1746e8aab Jan Beulich 2021-02-15 1345 if (nr_mops != 0)
e9ce7cb6b10740 Wei Liu 2014-06-04 1346 ret =
gnttab_map_refs(queue->tx_map_ops,
f53c3fe8dad725 Zoltan Kiss 2014-03-06 1347 NULL,
e9ce7cb6b10740 Wei Liu 2014-06-04 1348 queue->pages_to_map,
9074ce24932186 Zoltan Kiss 2014-04-02 1349 nr_mops);
f942dc2552b8bf Ian Campbell 2011-03-15 1350
e9ce7cb6b10740 Wei Liu 2014-06-04 1351 work_done = xenvif_tx_submit(queue);
b3f980bd827e6e Wei Liu 2013-08-26 1352
b3f980bd827e6e Wei Liu 2013-08-26 1353 return work_done;
f942dc2552b8bf Ian Campbell 2011-03-15 1354 }
f942dc2552b8bf Ian Campbell 2011-03-15 1355
:::::: The code at line 1334 was first introduced by commit
:::::: f53c3fe8dad725b014e9c7682720d8e3e2a8a5b3 xen-netback: Introduce TX grant mapping
:::::: TO: Zoltan Kiss <zoltan.kiss(a)citrix.com>
:::::: CC: David S. Miller <davem(a)davemloft.net>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org