linux-kernel - Re: [PATCH 0/4] x86-32: Clean up GS segment handling

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Message-ID: <9e1a95ef-69ad-1f6c-e1f3-dcff3ed65e79@kernel.org>
Date:   Fri, 25 Mar 2022 08:45:59 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Brian Gerst <brgerst@...il.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Cc:     Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 0/4] x86-32: Clean up GS segment handling

On 3/25/22 08:39, Brian Gerst wrote:
> Since commit 3fb0fdb3bbe ("Make the canary into a regular percpu
> variable"), the GS segment is no longer switched on kernel entry for
> 32-bit kernels.  Clean up the remaining code that handled lazy GS
> switching.
> 

Acked-by: Andy Lutomirski <luto@...nel.org>

Thanks!

> Brian Gerst (4):
>    x86-32: Simplify ELF_CORE_COPY_REGS
>    ELF: Remove elf_core_copy_kernel_regs()
>    x86-32: Remove lazy GS macros
>    x86: Merge load_gs_index()
> 
>   arch/powerpc/kernel/fadump.c               |  2 +-
>   arch/powerpc/platforms/powernv/opal-core.c |  2 +-
>   arch/x86/include/asm/elf.h                 | 15 ++-------------
>   arch/x86/include/asm/mmu_context.h         |  2 +-
>   arch/x86/include/asm/segment.h             | 12 ------------
>   arch/x86/include/asm/special_insns.h       |  7 ++++---
>   arch/x86/kernel/process.c                  |  5 +----
>   arch/x86/kernel/process_32.c               | 11 ++++-------
>   arch/x86/kernel/ptrace.c                   |  6 +++---
>   arch/x86/kernel/signal.c                   |  8 +++++---
>   arch/x86/kernel/vm86_32.c                  |  4 ++--
>   arch/x86/lib/insn-eval.c                   |  5 +++--
>   arch/x86/math-emu/get_address.c            |  2 +-
>   include/linux/elfcore.h                    |  9 ---------
>   kernel/kexec_core.c                        |  2 +-
>   15 files changed, 29 insertions(+), 63 deletions(-)
>