On Tue, Jan 05, 2021 at 11:37:09AM -0800, Alexei Starovoitov wrote: > 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. ok, how about: WARN: multiple IDs found for 'file': 526, 113351 - using 526 jirka
