Re: [PATCH 4/5] objtool/klp: add -z/--fuzz patch rebasing option

[Joe Lawrence <joe.lawrence@redhat.com>]

On Fri, Jan 30, 2026 at 11:58:06AM -0800, Song Liu wrote:
> On Fri, Jan 30, 2026 at 10:00 AM Joe Lawrence <joe.lawrence@redhat.com> wrote:
> [...]
> > @@ -807,6 +906,8 @@ build_patch_module() {
> >  process_args "$@"
> >  do_init
> >
> > +maybe_rebase_patches
> > +
> >  if (( SHORT_CIRCUIT <= 1 )); then
> 
> I think we should call maybe_rebase_patches within this
> if condition.
> 

Hi Song,

Ah yeah I stumbled on this, probably overthinking it:

  - we want to validate rebased patches (when requested)
  - validate_patches() isn't really required for step 1 (building the
    original kernel) but ...
  - it's nice to check the patches before going off and building a full
    kernel
  - the patches are needed in step 2 (building the patched kernel) but ...
  - patch validation occurs in step 1

so given the way the short circuiting works, I didn't see a good way to
fold it in there.  The user might want to jump right to building the
patched kernel with patch rebasing.  Maybe that's not valid thinking if
the rebase occurs in step 1 and they are left behind in klp-tmp/ (so
jumping to step 2 will just use the patches in the scratch dir and not
command line?).  It's Friday, maybe I'm missing something obvious? :)

--
Joe