net/netfilter/nf_tables_api.c:3089: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7589: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11020: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11063: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11354: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3089: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7587: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11018: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11061: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11352: warning: No description found for return value of 'nft_data_init'