linux-kernel - Re: [PATCH] arm64/alternatives: move length validation inside the subsection

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Message-ID: <20200730122201.GM25149@gaia>
Date:   Thu, 30 Jul 2020 13:22:01 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Will Deacon <will@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com, stable@...r.kernel.org
Subject: Re: [PATCH] arm64/alternatives: move length validation inside the
 subsection

On Wed, Jul 29, 2020 at 02:51:52PM -0700, Sami Tolvanen wrote:
> Commit f7b93d42945c ("arm64/alternatives: use subsections for replacement
> sequences") breaks LLVM's integrated assembler, because due to its
> one-pass design, it cannot compute instruction sequence lengths before the
> layout for the subsection has been finalized. This change fixes the build
> by moving the .org directives inside the subsection, so they are processed
> after the subsection layout is known.
> 
> Link: https://github.com/ClangBuiltLinux/linux/issues/1078
> Cc: <stable@...r.kernel.org> # 4.14+

Commit f7b93d42945c went in 5.8-rc4. Why is this cc stable from 4.14? If
Will picks it up for 5.8, it doesn't even need a cc stable.

Please add a Fixes: tag as well.

-- 
Catalin