net/netfilter/nf_tables_api.c:3103: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7755: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11154: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11197: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11488: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3103: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7755: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11169: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11212: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11503: warning: No description found for return value of 'nft_data_init'