On Fri, May 28, 2021 at 1:09 AM David Laight <David.Laight@xxxxxxxxxx> wrote: > > From: Andrii Nakryiko > > Sent: 27 May 2021 15:42 > ... > > I agree that empty structs are useful, but here we are talking about > > per-CPU variables only, which is the first use case so far, as far as > > I can see. If we had pahole 1.22 released and widely packaged it could > > have been a viable option to force it on everyone. > ... > > Would it be feasible to put the sources for pahole into the > kernel repository and build it at the same time as objtool? > > That would remove any issues about the latest version > not being available. That would be great for the kernel build, but pahole is more than just a DWARF-to-BTF converter and it has a substantial amount of logic for loading and processing DWARF before it gets converted to BTF. All BTF-related pieces are provided by libbpf, which is already part of kernel sources, so that's not a problem. DWARF processing is a problem and would add a new dependency on libdw-devel, at least. > > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales)
