linux-kernel - Re: [PATCH v2 11/29] vmlinux.lds.h: Replace RODATA with RO

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Date:   Mon, 11 Nov 2019 09:23:03 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Borislav Petkov <bp@...en8.de>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Will Deacon <will@...nel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        alpha <linux-alpha@...r.kernel.org>,
        "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        linux-c6x-dev@...ux-c6x.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Michal Simek <monstr@...str.eu>,
        Parisc List <linux-parisc@...r.kernel.org>,
        linux-xtensa@...ux-xtensa.org,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 11/29] vmlinux.lds.h: Replace RODATA with RO_DATA

On Mon, Nov 11, 2019 at 05:58:06PM +0100, Geert Uytterhoeven wrote:
> Hi Kees,
> 
> On Fri, Oct 11, 2019 at 2:07 AM Kees Cook <keescook@...omium.org> wrote:
> > There's no reason to keep the RODATA macro: replace the callers with
> > the expected RO_DATA macro.
> >
> > Signed-off-by: Kees Cook <keescook@...omium.org>
> > ---
> >  arch/alpha/kernel/vmlinux.lds.S      | 2 +-
> >  arch/ia64/kernel/vmlinux.lds.S       | 2 +-
> >  arch/microblaze/kernel/vmlinux.lds.S | 2 +-
> >  arch/mips/kernel/vmlinux.lds.S       | 2 +-
> >  arch/um/include/asm/common.lds.S     | 2 +-
> >  arch/xtensa/kernel/vmlinux.lds.S     | 2 +-
> >  include/asm-generic/vmlinux.lds.h    | 4 +---
> >  7 files changed, 7 insertions(+), 9 deletions(-)
> 
> Somehow you missed:
> 
>     arch/m68k/kernel/vmlinux-std.lds:  RODATA
>     arch/m68k/kernel/vmlinux-sun3.lds:      RODATA

Argh. I've sent a patch; sorry and thanks for catching this. For my own
cross-build testing, which defconfig targets will hit these two linker
scripts?

-Kees

> 
> Leading to build failures in next-20191111:
> 
>     /opt/cross/kisskb/gcc-4.6.3-nolibc/m68k-linux/bin/m68k-linux-ld:./arch/m68k/kernel/vmlinux.lds:29:
> syntax error
>     make[1]: *** [/kisskb/src/Makefile:1075: vmlinux] Error 1
> 
> Reported-by: noreply@...erman.id.au
> http://kisskb.ellerman.id.au/kisskb/buildresult/14022846/
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

-- 
Kees Cook