Re: [PATCH] arm64: alternatives: Move length validation in alternative_{insn,endif}

From: Catalin Marinas <catalin.marinas@arm.com>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Will Deacon <will@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Jian Cai <jiancai@google.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
	stable@vger.kernel.org
Subject: Re: [PATCH] arm64: alternatives: Move length validation in alternative_{insn,endif}
Date: Thu, 15 Apr 2021 10:17:43 +0100	[thread overview]
Message-ID: <20210415091743.GB1015@arm.com> (raw)
In-Reply-To: <20210414000803.662534-1-nathan@kernel.org>

Hi Nathan,

On Tue, Apr 13, 2021 at 05:08:04PM -0700, Nathan Chancellor wrote:
> After commit 2decad92f473 ("arm64: mte: Ensure TIF_MTE_ASYNC_FAULT is
> set atomically"), LLVM's integrated assembler fails to build entry.S:
> 
> <instantiation>:5:7: error: expected assembly-time absolute expression
>  .org . - (664b-663b) + (662b-661b)
>       ^
> <instantiation>:6:7: error: expected assembly-time absolute expression
>  .org . - (662b-661b) + (664b-663b)
>       ^

I tried the latest Linus' tree and linux-next (defconfig) with this
commit in and I can't get your build error. I used both clang-10 from
Debian stable and clang-11 from Debian sid. So, which clang version did
you use or which kernel config options?

-- 
Catalin