linux-kernel - Re: [PATCH v2] LOONGARCH: Make CONFIG_CMDLINE work with CONFIG_CMDLINE_EXTEND and CONFIG_CMDLINE

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Message-ID: <9e6c9fc1f70e7eac34290e0c38cd7d6989162403.camel@hotmail.com>
Date:   Tue, 11 Jul 2023 13:36:39 +0000
From:   ‎ donmor <donmor3000@...mail.com>
To:     "chenhuacai@...nel.org" <chenhuacai@...nel.org>,
        "xry111@...111.site" <xry111@...111.site>,
        "kernel@...0n.name" <kernel@...0n.name>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "loongarch@...ts.linux.dev" <loongarch@...ts.linux.dev>,
        "ardb@...nel.org" <ardb@...nel.org>,
        "tangyouling@...ngson.cn" <tangyouling@...ngson.cn>,
        "yangtiezhu@...ngson.cn" <yangtiezhu@...ngson.cn>,
        "zhoubinbin@...ngson.cn" <zhoubinbin@...ngson.cn>
Subject: Re: [PATCH v2] LOONGARCH: Make CONFIG_CMDLINE work with
 CONFIG_CMDLINE_EXTEND and CONFIG_CMDLINE_BOOTLOADER

Okay I'll get it amended right now.

donmor

在 2023-07-11星期二的 21:32 +0800，Xi Ruoyao写道：
> Use "LoongArch" instead of "LOONGARCH".  "LOONGARCH" should only show up
> in macro names, enum value names, etc.
> 
> On Tue, 2023-07-11 at 21:27 +0800, Dong Zhihong wrote:
> > This patch tends to make CONFIG_CMDLINE work with CONFIG_CMDLINE_EXTEND
> 
> As Markus already told you, submitting-patches.rst says:
> 
> "Describe your changes in imperative mood, e.g. "make xyzzy do frotz"
> instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy
> to do frotz", as if you are giving orders to the codebase to change
> its behaviour."
> 
> i. e. "Make CONFIG_CMDLINE work with ...".
> 
> > and CONFIG_CMDLINE_BOOTLOADER. The touched function is bootcmdline_init()`.
> > There's already code handling CONFIG_CMDLINE_FORCE, which replaces
> > `boot_command_line` with CONFIG_CMDLINE and immediately`goto out`. It'd be
> > similar way to handle CONFIG_CMDLINE_EXTEND and CONFIG_CMDLINE_BOOTLOADER,
> > so I added some code after OF_FLATTREE part to handle them.
> > 
> > Signed-off-by: Dong Zhihong <donmor3000@...mail.com>
> > ---
> > 
> > v2 -> v1:Reworded the commit message so it's more imperative (Markus);
> >         Added `goto out` to FDT part (Huacai)
> > 
> >  arch/loongarch/kernel/setup.c | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> > 
> > diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
> > index 78a00359bde3..3cafda1a409e 100644
> > --- a/arch/loongarch/kernel/setup.c
> > +++ b/arch/loongarch/kernel/setup.c
> > @@ -332,7 +332,24 @@ static void __init bootcmdline_init(char **cmdline_p)
> >                         strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
> >  
> >                 strlcat(boot_command_line, init_command_line, COMMAND_LINE_SIZE);
> > +               goto out;
> > +       }
> > +#endif
> > +
> > +#ifdef CONFIG_CMDLINE
> > +       /*
> > +        * If CONFIG_CMDLINE_BOOTLOADER is enabled then we use thei built-in
> > +        * command line if no command line given, or we append given command
> > +        * line to the built-in one if CONFIG_CMDLINE_EXTEND is enabled.
> > +        */
> > +       if (IS_ENABLED(CONFIG_CMDLINE_EXTEND)) {
> > +               strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
> > +               strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
> > +               strlcat(boot_command_line, init_command_line, COMMAND_LINE_SIZE);
> >         }
> > +
> > +       if (IS_ENABLED(CONFIG_CMDLINE_BOOTLOADER) && !boot_command_line[0])
> > +               strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
> >  #endif
> >  
> >  out: