Re: [PATCH 4/5] kbuild: unify vdso_install rules

[Masahiro Yamada]

On Wed, Oct 11, 2023 at 11:24 AM Guo Ren <guoren@xxxxxxxxxx> wrote:
>
> On Mon, Oct 9, 2023 at 8:42 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:

> > --- a/arch/riscv/Makefile
> > +++ b/arch/riscv/Makefile
> > @@ -131,12 +131,6 @@ endif
> >  libs-y += arch/riscv/lib/
> >  libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
> >
> > -PHONY += vdso_install
> > -vdso_install:
> > -       $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
> > -       $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
> > -               $(build)=arch/riscv/kernel/compat_vdso compat_$@)
> > -
> >  ifeq ($(KBUILD_EXTMOD),)
> >  ifeq ($(CONFIG_MMU),y)
> >  prepare: vdso_prepare
> > @@ -148,6 +142,9 @@ vdso_prepare: prepare0
> >  endif
> >  endif
> >
> > +vdso-install-y                 += arch/riscv/kernel/vdso/vdso.so.dbg
> > +vdso-install-$(CONFIG_COMPAT)  += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg:../compat_vdso/compat_vdso.so
> Why do we need ":../compat_vdso/compat_vdso.so" here?




All architectures except riscv install vdso files
to /lib/modules/$(uname -r)/vdso/.



See the following code in arch/riscv/kernel/compat_vdso/Makefile:


quiet_cmd_compat_vdso_install = INSTALL $@
      cmd_compat_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/compat_vdso/$@




Riscv copies the compat vdso to
/lib/modules/$(uname -r)/compat_vdso/.



This commit preserves the current installation path as-is.

If the riscv maintainers agree, we can change the
installation destination to /lib/modules/$(uname -r)/vdso/
for consistency.



-- 
Best Regards
Masahiro Yamada