Re: [PATCH net-next 5/5] net: dsa: forward bridge/switchdev mcast active notification

[kernel test robot <lkp@intel.com>]

Hi Linus,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net/main]
[also build test WARNING on linus/master v6.15-rc7 next-20250522]
[cannot apply to net-next/main horms-ipvs/master]
[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/Linus-L-ssing/net-bridge-mcast-explicitly-track-active-state/20250523-040914
base:   net/main
patch link:    https://lore.kernel.org/r/20250522195952.29265-6-linus.luessing%40c0d3.blue
patch subject: [PATCH net-next 5/5] net: dsa: forward bridge/switchdev mcast active notification
config: i386-randconfig-001-20250523 (https://download.01.org/0day-ci/archive/20250523/202505231706.fkxIDjje-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250523/202505231706.fkxIDjje-lkp@intel.com/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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505231706.fkxIDjje-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/dsa/user.c:661:3: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
     661 |                 const bool *handled = ctx;
         |                 ^
   net/dsa/user.c:3770:3: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
    3770 |                 struct switchdev_notifier_port_attr_info *item = ptr;
         |                 ^
   net/dsa/user.c:3813:3: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
    3813 |                 struct switchdev_notifier_port_attr_info *item = ptr;
         |                 ^
   3 warnings generated.


vim +661 net/dsa/user.c

   598	
   599	static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx,
   600					  const struct switchdev_attr *attr,
   601					  struct netlink_ext_ack *extack)
   602	{
   603		struct dsa_port *dp = dsa_user_to_port(dev);
   604		int ret;
   605	
   606		if (ctx && ctx != dp && attr->id != SWITCHDEV_ATTR_ID_BRIDGE_MC_ACTIVE)
   607			return 0;
   608	
   609		switch (attr->id) {
   610		case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
   611			if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
   612				return -EOPNOTSUPP;
   613	
   614			ret = dsa_port_set_state(dp, attr->u.stp_state, true);
   615			break;
   616		case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
   617			if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
   618				return -EOPNOTSUPP;
   619	
   620			ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
   621			break;
   622		case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
   623			if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
   624				return -EOPNOTSUPP;
   625	
   626			ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
   627						      extack);
   628			break;
   629		case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
   630			if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
   631				return -EOPNOTSUPP;
   632	
   633			ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
   634			break;
   635		case SWITCHDEV_ATTR_ID_BRIDGE_MST:
   636			if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
   637				return -EOPNOTSUPP;
   638	
   639			ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
   640			break;
   641		case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
   642			if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
   643				return -EOPNOTSUPP;
   644	
   645			ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
   646							extack);
   647			break;
   648		case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
   649			if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
   650				return -EOPNOTSUPP;
   651	
   652			ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
   653			break;
   654		case SWITCHDEV_ATTR_ID_VLAN_MSTI:
   655			if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
   656				return -EOPNOTSUPP;
   657	
   658			ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
   659			break;
   660		case SWITCHDEV_ATTR_ID_BRIDGE_MC_ACTIVE:
 > 661			const bool *handled = ctx;
   662	
   663			if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
   664				return -EOPNOTSUPP;
   665	
   666			ret = dsa_port_bridge_mdb_active(dp, attr->u.mc_active, extack,
   667							 *handled);
   668			break;
   669		default:
   670			ret = -EOPNOTSUPP;
   671			break;
   672		}
   673	
   674		return ret;
   675	}
   676	

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