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From: kernel test robot <lkp@intel.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: kbuild-all@lists.01.org, xen-devel@lists.xenproject.org,
	Juergen Gross <jgross@suse.com>
Subject: [xen-tip:linux-next 7/9] drivers/net/xen-netback/netback.c:1334:17: warning: variable 'ret' set but not used
Date: Wed, 17 Feb 2021 04:32:23 +0800	[thread overview]
Message-ID: <202102170412.vJgSEw1F-lkp@intel.com> (raw)

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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=3194a1746e8aabe86075fd3c5e7cf1f4632d7f16
        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@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@citrix.com>
:::::: CC: David S. Miller <davem@davemloft.net>

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

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WARNING: multiple messages have this Message-ID (diff)
From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [xen-tip:linux-next 7/9] drivers/net/xen-netback/netback.c:1334:17: warning: variable 'ret' set but not used
Date: Wed, 17 Feb 2021 04:32:23 +0800	[thread overview]
Message-ID: <202102170412.vJgSEw1F-lkp@intel.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 3663 bytes --]

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=3194a1746e8aabe86075fd3c5e7cf1f4632d7f16
        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@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@citrix.com>
:::::: CC: David S. Miller <davem@davemloft.net>

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

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             reply	other threads:[~2021-02-16 20:34 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-16 20:32 kernel test robot [this message]
2021-02-16 20:32 ` [xen-tip:linux-next 7/9] drivers/net/xen-netback/netback.c:1334:17: warning: variable 'ret' set but not used kernel test robot

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