linux-kernel - Re: [PATCH v2] arch/x86/microcode: Mark early_parse_cmdline() as _

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Message-ID: <20251029123823.GAaQIKvz4gUk3Nsaj4@fat_crate.local>
Date: Wed, 29 Oct 2025 13:38:23 +0100
From: Borislav Petkov <bp@...en8.de>
To: Yu Peng <pengyu@...inos.cn>
Cc: tglx@...utronix.de, mingo@...hat.com, dave.hansen@...ux.intel.com,
	x86@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	Yu Peng <pengyu@...inos.com>
Subject: Re: [PATCH v2] arch/x86/microcode: Mark early_parse_cmdline() as
 __init

On Wed, Oct 29, 2025 at 04:16:44PM +0800, Yu Peng wrote:
> From: Yu Peng <pengyu@...inos.com>
> 
> Fix section mismatch warning reported by modpost:
>   .text:early_parse_cmdline() -> .init.data:boot_command_line

How do you trigger this?

CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y

in my config doesn't cause anything.

That's because

$ readelf -s vmlinux | grep early_parse_cmdline

doesn't give anything because my compiler inlines it anyway.

So it must be something about your .config or toolchain or whatnot, which
causes it.

I mean, the patch is obviously correct but I'd still like to know how it
triggers.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette