net/netfilter/nf_tables_api.c:3081: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7556: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10907: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:10950: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11212: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3081: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7556: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:10905: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:10948: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11210: warning: No description found for return value of 'nft_data_init'