Re: [PATCH net v1] igmp: use copy-on-write RCU updates in ip_mc_source()
From: kernel test robot
Date: Mon Nov 02 2026 - 13:53:30 EST
Hi Binbin,
kernel test robot noticed the following build errors:
[auto build test ERROR on net/main]
url: https://github.com/intel-lab-lkp/linux/commits/Binbin-Deng/igmp-use-copy-on-write-RCU-updates-in-ip_mc_source/20261102-175312
base: net/main
patch link: https://lore.kernel.org/r/20261102095312.47767-1-18983559317%40163.com
patch subject: [PATCH net v1] igmp: use copy-on-write RCU updates in ip_mc_source()
config: sparc64-randconfig-1001-20261102 (https://download.01.org/0day-ci/archive/20261103/202611030211.aklzSdgm-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261103/202611030211.aklzSdgm-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202611030211.aklzSdgm-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
net/ipv4/igmp.c:2646:1: error: function definition is not allowed here
2646 | {
| ^
net/ipv4/igmp.c:2737:1: error: function definition is not allowed here
2737 | {
| ^
net/ipv4/igmp.c:2802:1: error: function definition is not allowed here
2802 | {
| ^
net/ipv4/igmp.c:2851:1: error: function definition is not allowed here
2851 | {
| ^
net/ipv4/igmp.c:2898:1: error: function definition is not allowed here
2898 | {
| ^
net/ipv4/igmp.c:2924:1: error: function definition is not allowed here
2924 | {
| ^
net/ipv4/igmp.c:3277:1: error: function definition is not allowed here
3277 | {
| ^
>> net/ipv4/igmp.c:3294:19: error: use of undeclared identifier 'igmp_netdev_event'; did you mean 'igmp_ifc_event'?
3294 | .notifier_call = igmp_netdev_event,
| ^~~~~~~~~~~~~~~~~
| igmp_ifc_event
net/ipv4/igmp.c:884:13: note: 'igmp_ifc_event' declared here
884 | static void igmp_ifc_event(struct in_device *in_dev)
| ^
>> net/ipv4/igmp.c:3294:19: error: incompatible function pointer types initializing 'notifier_fn_t' (aka 'int (*)(struct notifier_block *, unsigned long, void *)') with an expression of type 'void (struct in_device *)' [-Wincompatible-function-pointer-types]
3294 | .notifier_call = igmp_netdev_event,
| ^~~~~~~~~~~~~~~~~
net/ipv4/igmp.c:3298:1: error: function definition is not allowed here
3298 | {
| ^
>> net/ipv4/igmp.c:3316:2: error: expected '}'
3316 | }
| ^
net/ipv4/igmp.c:2485:1: note: to match this '{'
2485 | {
| ^
11 errors generated.
vim +3294 net/ipv4/igmp.c
4aa5dee4d99978 Jiri Pirko 2013-07-20 3292
4aa5dee4d99978 Jiri Pirko 2013-07-20 3293 static struct notifier_block igmp_notifier = {
4aa5dee4d99978 Jiri Pirko 2013-07-20 @3294 .notifier_call = igmp_netdev_event,
4aa5dee4d99978 Jiri Pirko 2013-07-20 3295 };
4aa5dee4d99978 Jiri Pirko 2013-07-20 3296
72c1d3bdd5bf10 WANG Cong 2014-01-10 3297 int __init igmp_mc_init(void)
7091e728c57015 Alexey Dobriyan 2008-12-25 3298 {
72c1d3bdd5bf10 WANG Cong 2014-01-10 3299 #if defined(CONFIG_PROC_FS)
4aa5dee4d99978 Jiri Pirko 2013-07-20 3300 int err;
4aa5dee4d99978 Jiri Pirko 2013-07-20 3301
4aa5dee4d99978 Jiri Pirko 2013-07-20 3302 err = register_pernet_subsys(&igmp_net_ops);
4aa5dee4d99978 Jiri Pirko 2013-07-20 3303 if (err)
4aa5dee4d99978 Jiri Pirko 2013-07-20 3304 return err;
4aa5dee4d99978 Jiri Pirko 2013-07-20 3305 err = register_netdevice_notifier(&igmp_notifier);
4aa5dee4d99978 Jiri Pirko 2013-07-20 3306 if (err)
4aa5dee4d99978 Jiri Pirko 2013-07-20 3307 goto reg_notif_fail;
4aa5dee4d99978 Jiri Pirko 2013-07-20 3308 return 0;
4aa5dee4d99978 Jiri Pirko 2013-07-20 3309
4aa5dee4d99978 Jiri Pirko 2013-07-20 3310 reg_notif_fail:
4aa5dee4d99978 Jiri Pirko 2013-07-20 3311 unregister_pernet_subsys(&igmp_net_ops);
4aa5dee4d99978 Jiri Pirko 2013-07-20 3312 return err;
72c1d3bdd5bf10 WANG Cong 2014-01-10 3313 #else
72c1d3bdd5bf10 WANG Cong 2014-01-10 3314 return register_netdevice_notifier(&igmp_notifier);
^1da177e4c3f41 Linus Torvalds 2005-04-16 3315 #endif
72c1d3bdd5bf10 WANG Cong 2014-01-10 @3316 }
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