Hi Florian, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: df8d11fbcbb07177c2500e63d7f5a36063977596 commit: 83abe3a3b85762720192809ac8695ff9255cfd23 [1941/1941] netfilter: nat: remove csum_recalc hook config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20251213/202512130517.YGb86X1A-lkp@i...) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 6ec8c4351cfc1d0627d1633b02ea787bd29c77d8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251213/202512130517.YGb86X1A-lkp@i...) 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/202512130517.YGb86X1A-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from net/netfilter/nf_nat_proto.c:12: In file included from include/net/ip6_route.h:24: include/net/ip6_fib.h:228:10: warning: default initialization of an object of type 'typeof (f6i->expires)' (aka 'const unsigned long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe] 228 | return time_after(jiffies, f6i->expires); | ^ include/linux/jiffies.h:107:3: note: expanded from macro 'time_after' 107 | typecheck(unsigned long, b) && \ | ^ include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck' 11 | typeof(x) __dummy2; \ | ^

...

net/netfilter/nf_nat_proto.c:56:6: warning: no previous prototype for function 'nf_nat_csum_recalc' [-Wmissing-prototypes] 56 | void nf_nat_csum_recalc(struct sk_buff *skb, | ^ net/netfilter/nf_nat_proto.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 56 | void nf_nat_csum_recalc(struct sk_buff *skb, | ^ | static 2 warnings generated.

vim +/nf_nat_csum_recalc +56 net/netfilter/nf_nat_proto.c 55

56 void nf_nat_csum_recalc(struct sk_buff *skb,

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