linux-kernel - Re: [PATCH 1/2] kbuild: factor out genksyms command from cmd_gensymtypes

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Date:   Tue, 5 Apr 2022 10:55:09 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH 1/2] kbuild: factor out genksyms command from cmd_gensymtypes_{c,S}

On Wed, Mar 30, 2022 at 3:18 AM Nick Desaulniers
<ndesaulniers@...gle.com> wrote:
>
> On Mon, Mar 28, 2022 at 7:15 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
> >
> > The genksyms command part in cmd_gensymtypes_{c,S} is duplicated.
> > Factor it out into the 'genksyms' macro.
> >
> > For the readability, I slightly refactor the arguments to genksyms.
>
> Looks nicer, thanks for the patch!
> Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
>
> >

Applied to linux-kbuild.


> > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> > ---
> >
> >  scripts/Makefile.build | 19 ++++++++-----------
> >  1 file changed, 8 insertions(+), 11 deletions(-)
> >
> > diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> > index 9717e6f6fb31..3f2985df4d60 100644
> > --- a/scripts/Makefile.build
> > +++ b/scripts/Makefile.build
> > @@ -125,13 +125,14 @@ cmd_cpp_i_c       = $(CPP) $(c_flags) -o $@ $<
> >  $(obj)/%.i: $(src)/%.c FORCE
> >         $(call if_changed_dep,cpp_i_c)
> >
> > +genksyms = scripts/genksyms/genksyms           \
> > +       $(if $(1), -T $(2))                     \
> > +       $(if $(CONFIG_MODULE_REL_CRCS), -R)     \
> > +       $(if $(KBUILD_PRESERVE), -p)            \
> > +       -r $(or $(wildcard $(2:.symtypes=.symref), /dev/null))
> > +
> >  # These mirror gensymtypes_S and co below, keep them in synch.
> > -cmd_gensymtypes_c =                                                         \
> > -    $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
> > -    scripts/genksyms/genksyms $(if $(1), -T $(2))                           \
> > -     $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS))                             \
> > -     $(if $(KBUILD_PRESERVE),-p)                                            \
> > -     -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
> > +cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
> >
> >  quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
> >  cmd_cc_symtypes_c =                                                         \
> > @@ -344,11 +345,7 @@ cmd_gensymtypes_S =                                                         \
> >      $(CPP) $(a_flags) $< |                                                  \
> >       grep "\<___EXPORT_SYMBOL\>" |                                          \
> >       sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \
> > -    $(CPP) -D__GENKSYMS__ $(c_flags) -xc - |                                \
> > -    scripts/genksyms/genksyms $(if $(1), -T $(2))                           \
> > -     $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS))                             \
> > -     $(if $(KBUILD_PRESERVE),-p)                                            \
> > -     -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
> > +    $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms)
> >
> >  quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
> >  cmd_cc_symtypes_S =                                                         \
> > --
> > 2.32.0
> >
>
>
> --
> Thanks,
> ~Nick Desaulniers



-- 
Best Regards
Masahiro Yamada