net/netfilter/nf_tables_api.c:3087: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7561: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10973: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11016: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11278: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3087: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7561: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10976: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11019: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11281: warning: No description found for return value of 'nft_data_init'