kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_NFT_RBTREE.
Result is shown for kernelversion 6.5.1

Netfilter nf_tables rbtree set module

modulename: nft_rbtree.ko
configname: CONFIG_NFT_RBTREE

Linux Kernel Configuration
└─> Networking support
└─> Networking options
└─> Network packet filtering framework (Netfilter)
└─> Core Netfilter Configuration
└─> Netfilter nf_tables rbtree set module

In linux kernel since version 3.13 (release Date: 2014-01-19)  


source code:


net/netfilter/nft_rbtree.c