linux-kernel - Re: [PATCH 0/8] x86 signal code cleanups

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Date:   Mon, 06 Jun 2022 17:17:47 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     Brian Gerst <brgerst@...il.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 0/8] x86 signal code cleanups

Brian Gerst <brgerst@...il.com> writes:

> The 32-bit signal code has significant differences from 64-bit, and
> those are duplicated for native and compat modes.  This patch series
> merges the 32-bit code into one file, and does some general cleanups
> in the x86 signal code.  There should be no functional changes.

At a quick skim I don't see anything scary in there.

Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>

> Brian Gerst (8):
>   x86/signal: Remove sig parameter from frame setup functions
>   x86/signal: Remove sigset_t parameter from frame setup functions
>   signal/compat: Remove compat_sigset_t override
>   x86: Remove __USER32_DS
>   x86/signal: Merge get_sigframe()
>   x86/signal: Add ABI prefixes to frame setup functions
>   x86/signal/32: Merge native and compat 32-bit signal code
>   x86/signal/64: Move 64-bit signal code to its own file
>
>  arch/x86/entry/entry_64_compat.S              |   4 +-
>  arch/x86/ia32/Makefile                        |   2 -
>  arch/x86/include/asm/elf.h                    |   4 -
>  arch/x86/include/asm/fpu/signal.h             |   7 -
>  arch/x86/include/asm/segment.h                |   2 +-
>  arch/x86/include/asm/sighandling.h            |   9 +
>  arch/x86/include/asm/signal.h                 |   5 -
>  arch/x86/kernel/Makefile                      |   4 +-
>  arch/x86/kernel/signal.c                      | 654 +-----------------
>  .../ia32_signal.c => kernel/signal_32.c}      | 117 ++--
>  arch/x86/kernel/signal_64.c                   | 383 ++++++++++
>  arch/x86/xen/xen-asm.S                        |   8 +-
>  include/linux/compat.h                        |   2 -
>  include/linux/syscalls.h                      |   2 +
>  14 files changed, 493 insertions(+), 710 deletions(-)
>  rename arch/x86/{ia32/ia32_signal.c => kernel/signal_32.c} (82%)
>  create mode 100644 arch/x86/kernel/signal_64.c

Eric