linux-kernel - Re: [PATCH v5 mips-next 0/9] MIPS: vmlinux.lds.S sections fixes & cleanup

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Date:   Mon, 11 Jan 2021 23:43:05 +0100
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Alexander Lobakin <alobakin@...me>
Cc:     Kees Cook <keescook@...omium.org>, Arnd Bergmann <arnd@...db.de>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Pei Huang <huangpei@...ngson.cn>,
        Fangrui Song <maskray@...gle.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Corey Minyard <cminyard@...sta.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, stable@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH v5 mips-next 0/9] MIPS: vmlinux.lds.S sections fixes &
 cleanup

On Mon, Jan 11, 2021 at 08:57:25PM +0000, Alexander Lobakin wrote:
> From: Kees Cook <keescook@...omium.org>
> Date: Mon, 11 Jan 2021 11:53:39 -0800
> 
> > On Sun, Jan 10, 2021 at 11:53:50AM +0000, Alexander Lobakin wrote:
> >> This series hunts the problems discovered after manual enabling of
> >> ARCH_WANT_LD_ORPHAN_WARN. Notably:
> >>  - adds the missing PAGE_ALIGNED_DATA() section affecting VDSO
> >>    placement (marked for stable);
> >>  - stops blind catching of orphan text sections with .text.*
> >>    directive;
> >>  - properly stops .eh_frame section generation.
> >>
> >> Compile and runtime tested on MIPS32R2 CPS board with no issues
> >> using two different toolkits:
> >>  - Binutils 2.35.1, GCC 10.2.1 (with Alpine patches);
> >>  - LLVM stack: 11.0.0 and from latest Git snapshot.
> >>
> >> Since v4 [3]:
> >>  - new: drop redundant .text.cps-vec creation and blind inclusion
> >>    of orphan text sections via .text.* directive in vmlinux.lds.S;
> >>  - don't assert SIZEOF(.rel.dyn) as it's reported that it may be not
> >>    empty on certain machines and compilers (Thomas);
> >>  - align GOT table like it's done for ARM64;
> >>  - new: catch UBSAN's "unnamed data" sections in generic definitions
> >>    when building with LD_DEAD_CODE_DATA_ELIMINATION;
> >>  - collect Reviewed-bys (Kees, Nathan).
> >
> > Looks good; which tree will this land through?
> 
> linux-mips/mips-next I guess, since 7 of 9 patches are related only
> to this architecture.
> This might need Arnd's Acked-bys or Reviewed-by for the two that
> refer include/asm-generic, let's see what Thomas think.

Looks good from my side and I have it already sitting in branch for
submission.

Arnd, are you ok with the changes in include/asm-generic ?

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]