Hi Wei, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 46abe407b020831448331eea487e07c883e95836 commit: e9ce37bbceb2779c0015fcac54cc8df7a2ec8b76 [2882/2882] tcp_comp: implement sendmsg for tcp compression config: x86_64-randconfig-102-20250502 (https://download.01.org/0day-ci/archive/20250502/202505021845.WkxnVSOV-lkp@i...) 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/20250502/202505021845.WkxnVSOV-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/202505021845.WkxnVSOV-lkp@intel.com/ All errors (new ones prefixed by >>):

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ld.lld: error: undefined symbol: sk_msg_alloc

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referenced by tcp_comp.c:148 (net/ipv4/tcp_comp.c:148) ipv4/tcp_comp.o:(tcp_comp_sendmsg) in archive net/built-in.a -- ld.lld: error: undefined symbol: sk_msg_trim referenced by tcp_comp.c:236 (net/ipv4/tcp_comp.c:236) ipv4/tcp_comp.o:(tcp_comp_sendmsg) in archive net/built-in.a

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