linux-kernel - Re: [PATCH 2/2] x86,vdso: Fix vdso

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Message-ID: <20140611185119.GA13412@ravnborg.org>
Date:	Wed, 11 Jun 2014 20:51:19 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Josh Boyer <jwboyer@...oraproject.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	"H. Peter Anvin" <hpa@...or.com>, Michal Marek <mmarek@...e.cz>,
	linux-kbuild@...r.kernel.org,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] x86,vdso: Fix vdso_install

On Wed, Jun 11, 2014 at 01:23:59PM -0400, Josh Boyer wrote:
> On Wed, Jun 11, 2014 at 12:20 PM, Andy Lutomirski <luto@...capital.net> wrote:
> > Rather than monkeying with barely-comprehensible static pattern
> > rules, just use an explicit loop.
> >
> > Signed-off-by: Andy Lutomirski <luto@...capital.net>
> > ---
> >  arch/x86/vdso/Makefile | 20 +++++++-------------
> >  1 file changed, 7 insertions(+), 13 deletions(-)
> >
> > diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
> > index 9769df0..b1c70cc 100644
> > --- a/arch/x86/vdso/Makefile
> > +++ b/arch/x86/vdso/Makefile
> > @@ -9,11 +9,6 @@ VDSOX32-$(CONFIG_X86_X32_ABI)  := y
> >  VDSO32-$(CONFIG_X86_32)                := y
> >  VDSO32-$(CONFIG_COMPAT)                := y
> >
> > -vdso-install-$(VDSO64-y)       += vdso.so
> > -vdso-install-$(VDSOX32-y)      += vdsox32.so
> > -vdso-install-$(VDSO32-y)       += $(vdso32-images)
> > -
> > -
> >  # files to link into the vdso
> >  vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o
> >
> > @@ -176,15 +171,14 @@ VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
> >  GCOV_PROFILE := n
> >
> >  #
> > -# Install the unstripped copy of vdso*.so listed in $(vdso-install-y).
> > +# Install the unstripped copies of vdso*.so listed in $(vdso-install-y).
> >  #
> > -quiet_cmd_vdso_install = INSTALL $@
> > -      cmd_vdso_install = cp $(obj)/$@...g $(MODLIB)/vdso/$@
> > -$(vdso-install-y): %.so: $(obj)/%.so.dbg FORCE
> > -       @mkdir -p $(MODLIB)/vdso
> > -       $(call cmd,vdso_install)
> > +quiet_cmd_vdso_install = INSTALL $(sofile)
> > +      cmd_vdso_install = cp $(obj)/$(sofile).dbg $(MODLIB)/vdso/$(sofile)
> >
> > -PHONY += vdso_install $(vdso-install-y)
> > -vdso_install: $(vdso-install-y)
> > +PHONY += vdso_install
> > +vdso_install: $(vdso_img_sodbg:%=$(obj)/%) FORCE
> > +       @mkdir -p $(MODLIB)/vdso
> > +       @$(foreach sofile,$(vdso_img_sodbg:%.dbg=%),$(call recipe-cmd,vdso_install);)

Can we please fix this in a way where we do not need to add stuff to core kbuild.
If the original approach was used then make took care of the looping
and the foreach part was not needed.


	Sam
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