On Tue, Jan 5, 2021 at 7:39 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote: > > The kernel image can contain multiple types (structs/unions) > with the same name. This causes distinct type hierarchies in > BTF data and makes resolve_btfids fail with error like: > > BTFIDS vmlinux > FAILED unresolved symbol udp6_sock > > as reported by Qais Yousef [1]. > > This change adds warning when multiple types of the same name > are detected: > > BTFIDS vmlinux > WARN: multiple IDs found for 'file' (526, 113351) > WARN: multiple IDs found for 'sk_buff' (2744, 113958) > > We keep the lower ID for the given type instance and let the > build continue. I think it would make sense to mention this decision in the warning. 'WARN: multiple IDs' is ambiguous and confusing when action is not specified.
