Re: [PATCH] kbuild: teach kselftest-merge to find nested config files

[Masahiro Yamada]

On Fri, May 31, 2019 at 4:00 AM Dan Rue <dan.rue@xxxxxxxxxx> wrote:
>
> On Mon, May 20, 2019 at 07:56:41PM +0200, Greg KH wrote:
> > On Mon, May 20, 2019 at 10:16:14AM -0500, Dan Rue wrote:
> > > Current implementation of kselftest-merge only finds config files that
> > > are one level deep using `$(srctree)/tools/testing/selftests/*/config`.
> > >
> > > Often, config files are added in nested directories, and do not get
> > > picked up by kselftest-merge.
> > >
> > > Use `find` to catch all config files under
> > > `$(srctree)/tools/testing/selftests` instead.
> > >
> > > Signed-off-by: Dan Rue <dan.rue@xxxxxxxxxx>
> > > ---
> > >  Makefile | 5 ++---
> > >  1 file changed, 2 insertions(+), 3 deletions(-)
> >
> > To be more specific here, the binderfs test is not catching the config
> > entry, so it would be nice to get this into the stable trees as well :)
> >
> > > diff --git a/Makefile b/Makefile
> > > index a45f84a7e811..e99e7f9484af 100644
> > > --- a/Makefile
> > > +++ b/Makefile
> > > @@ -1228,9 +1228,8 @@ kselftest-clean:
> > >  PHONY += kselftest-merge
> > >  kselftest-merge:
> > >     $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
> > > -   $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
> > > -           -m $(objtree)/.config \
> > > -           $(srctree)/tools/testing/selftests/*/config
> > > +   $(Q)find $(srctree)/tools/testing/selftests -name config | \
> > > +           xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
> > >     +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
> > >
> > >  # ---------------------------------------------------------------------------
> >
> > is find run with $(Q)?  It isn't with other instances in the Makefile.
>
> I'm not entirely sure all the ways that $(Q) is used (it looks like it
> just gets set to @), but if i run 'KBUILD_VERBOSE=1 make
> kselftest-merge' I do see the find command printed before running:
>
>     find ./tools/testing/selftests -name config | \
>           xargs ./scripts/kconfig/merge_config.sh -m ./.config
>
> I noticed find used inconsistently (sometimes with @, sometimes with
> $(Q), sometimes with neither), so I picked the usage that seemed most
> correct to me.


I agree. Using $(Q) looks correct to me.



> Dan
>
> >
> > thanks,
> >
> > greg k-h
>
> --
> Linaro - Kernel Validation



-- 
Best Regards
Masahiro Yamada