linux-kernel - Re: [PATCH v1 2/3] objtool/LoongArch: Fix unreachable instruction warnings about EFISTUB

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Message-ID: <ccbb40c1-5f2d-77e9-e8d2-52f2fdbad645@loongson.cn>
Date: Thu, 4 Sep 2025 10:18:12 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>, Huacai Chen
 <chenhuacai@...nel.org>, Nathan Chancellor <nathan@...nel.org>,
 loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] objtool/LoongArch: Fix unreachable instruction
 warnings about EFISTUB

On 2025/9/4 上午3:19, Josh Poimboeuf wrote:
> On Mon, Sep 01, 2025 at 04:39:29PM +0800, Tiezhu Yang wrote:
>> On 2025/9/1 下午4:19, Peter Zijlstra wrote:
>>> On Mon, Sep 01, 2025 at 03:21:55PM +0800, Tiezhu Yang wrote:
>>>> When compiling with LLVM and CONFIG_LTO_CLANG is set, there exist the
>>>> following objtool warnings:

...

>> Josh suggested to do something to put these instructions in the data
>> section, but as said in the previous reply, it needs to modify the link
>> process and seems too complicated and expensive for this warning to some
>> extent.
>>
>> So I did this change for objtool.
> 
> I don't like this workaround either, how exactly is it complicated and
> expensive to put the data in a data section?

I can put them in a data section in the next version, this is
reasonable.

Thanks,
Tiezhu