net/netfilter/nf_tables_api.c:3038: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7501: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10969: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11012: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11274: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3038: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7513: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10837: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:10880: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11142: warning: No description found for return value of 'nft_data_init'