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Date:   Tue, 2 Feb 2021 19:09:21 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     linux-kernel@vger.kernel.org, Petr Mladek <pmladek@suse.com>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        John Ogness <john.ogness@linutronix.de>,
        Andy Shevchenko <andy@infradead.org>,
        Ard Biesheuvel <ardb@kernel.org>,
        Borislav Petkov <bp@alien8.de>,
        Darren Hart <dvhart@infradead.org>,
        Dimitri Sivanich <dimitri.sivanich@hpe.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
        Jiri Slaby <jirislaby@kernel.org>,
        Mike Travis <mike.travis@hpe.com>,
        Peter Jones <pjones@redhat.com>,
        Russ Anderson <russ.anderson@hpe.com>,
        Steve Wahl <steve.wahl@hpe.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        dri-devel@lists.freedesktop.org, linux-efi@vger.kernel.org,
        linux-fbdev@vger.kernel.org, platform-driver-x86@vger.kernel.org,
        x86@kernel.org
Subject: Re: [PATCH 1/3] printk: use CONFIG_CONSOLE_LOGLEVEL_* directly
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References: <20210202070218.856847-1-masahiroy@kernel.org>
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On (21/02/02 16:02), Masahiro Yamada wrote:
> 
> CONSOLE_LOGLEVEL_DEFAULT is nothing more than a shorthand of
> CONFIG_CONSOLE_LOGLEVEL_DEFAULT.
> 
> When you change CONFIG_CONSOLE_LOGLEVEL_DEFAULT from Kconfig, almost
> all objects are rebuilt because CONFIG_CONSOLE_LOGLEVEL_DEFAULT is
> used in <linux/printk.h>, which is included from most of source files.
> 
> In fact, there are only 4 users of CONSOLE_LOGLEVEL_DEFAULT:
> 
>   arch/x86/platform/uv/uv_nmi.c
>   drivers/firmware/efi/libstub/efi-stub-helper.c
>   drivers/tty/sysrq.c
>   kernel/printk/printk.c
> 
> So, when you change CONFIG_CONSOLE_LOGLEVEL_DEFAULT and rebuild the
> kernel, it is enough to recompile those 4 files.

Do you change CONFIG_CONSOLE_LOGLEVEL_DEFAULT so often that it becomes a
problem?

	-ss