linux-kernel - Re: Re: [PATCH] ARM: Fix support for CMDLINE

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Message-ID: <tencent_F967B6C3FF5405F2D17EF660590BFD213C0A@qq.com>
Date: Mon, 31 Mar 2025 08:29:21 +0000
From: 谢致邦 (XIE Zhibang) <Yeking@...54.com>
To: linux@...linux.org.uk
Cc: Yeking@...54.com,
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Subject: Re: Re: [PATCH] ARM: Fix support for CMDLINE_EXTEND

> Later arguments override earlier arguments. Any compiled-in command line
> needs to be overridable by user supplied input from the boot loader. The
> current behaviour is correct.

CMDLINE_EXTEND is for the built-in command line to "Extend bootloader kernel
arguments", not for the bootloader command line to extend/override built-in
command line.

Don't forget that the default empty CMDLINE already gives the bootloader the
ability to override everything. Not to mention that even if CMDLINE is not
empty, the default CMDLINE_FROM_BOOTLOADER continues to give the bootloader the
ability to override all.