What is BTF generation unavailability?

[Heyholiday067]

During compilation,i met this mere error. However,the driver file is still generated fine.

Should i ignore or i have to fix this error?

[SimplyCEO]

BTF (BPF Type Format) is the metadata format which encodes the debug info related to BPF program/map. The name BTF was used initially to describe data types. The BTF was later extended to include function info for defined subroutines, and line info for source/line information.

From: https://www.kernel.org/doc/html/latest/bpf/btf.html