linux-kernel - Re: [RFC PATCH v6 1/1] cmdline: Add capability to both append and prepend at the same time

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Message-ID: <CAL_JsqJ=UNfptbNHR5XAS9BQRv3C5+YonW9rwypA5gGt2N7bGQ@mail.gmail.com>
Date:   Thu, 8 Apr 2021 15:08:00 -0500
From:   Rob Herring <robh@...nel.org>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Will Deacon <will@...nel.org>, Daniel Walker <danielwa@...co.com>,
        Daniel Gimpelevich <daniel@...pelevich.san-francisco.ca.us>,
        Arnd Bergmann <arnd@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "open list:GENERIC INCLUDE/ASM HEADER FILES" 
        <linux-arch@...r.kernel.org>, devicetree@...r.kernel.org,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        microblaze <monstr@...str.eu>,
        "open list:MIPS" <linux-mips@...r.kernel.org>,
        nios2 <ley.foon.tan@...el.com>,
        Openrisc <openrisc@...ts.librecores.org>,
        linux-hexagon@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        X86 ML <x86@...nel.org>, linux-xtensa@...ux-xtensa.org,
        SH-Linux <linux-sh@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>
Subject: Re: [RFC PATCH v6 1/1] cmdline: Add capability to both append and
 prepend at the same time

On Sun, Apr 4, 2021 at 12:20 PM Christophe Leroy
<christophe.leroy@...roup.eu> wrote:
>
> One user has expressed the need to both append and prepend some
> built-in parameters to the command line provided by the bootloader.
>
> Allthough it is a corner case, it is easy to implement so let's do it.
>
> When the user chooses to prepend the bootloader provided command line
> with the built-in command line, he is offered the possibility to enter
> an additionnal built-in command line to be appended after the
> bootloader provided command line.
>
> It is a complementary feature which has no impact on the already
> existing ones and/or the existing defconfig.
>
> Suggested-by: Daniel Walker <danielwa@...co.com>
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
> ---
> Sending this out as an RFC, applies on top of the series
> ("Implement GENERIC_CMDLINE"). I will add it to the series next spin
> unless someone is against it.

Well, it works, but you are working around the existing kconfig and
the result is not great. You'd never design it this way.

Rob