net/netfilter/nf_tables_api.c:3091: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7609: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11043: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11086: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11377: warning: No description found for return value of 'nft_data_init' net/netfilter/nf_tables_api.c:3091: warning: No description found for return value of 'nft_register_expr' net/netfilter/nf_tables_api.c:7609: warning: No description found for return value of 'nft_register_obj' net/netfilter/nf_tables_api.c:11042: warning: No description found for return value of 'nft_parse_u32_check' net/netfilter/nf_tables_api.c:11085: warning: No description found for return value of 'nft_dump_register' net/netfilter/nf_tables_api.c:11376: warning: No description found for return value of 'nft_data_init'