linux-kernel - Re: [PATCH v7 15/15] RISC-V: Build Infastructure

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Date:   Tue, 1 Aug 2017 08:27:51 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Palmer Dabbelt <palmer@...belt.com>, peterz@...radead.org,
        tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
        Arnd Bergmann <arnd@...db.de>
Cc:     yamada.masahiro@...ionext.com, mmarek@...e.com, albert@...ive.com,
        will.deacon@....com, boqun.feng@...il.com, oleg@...hat.com,
        mingo@...hat.com, daniel.lezcano@...aro.org,
        gregkh@...uxfoundation.org, jslaby@...e.com, davem@...emloft.net,
        mchehab@...nel.org, hverkuil@...all.nl, viro@...iv.linux.org.uk,
        mhiramat@...nel.org, fweisbec@...il.com, mcgrof@...nel.org,
        dledford@...hat.com, bart.vanassche@...disk.com,
        sstabellini@...nel.org, mpe@...erman.id.au,
        rmk+kernel@...linux.org.uk, paul.gortmaker@...driver.com,
        nicolas.dichtel@...nd.com, linux@...ck-us.net,
        heiko.carstens@...ibm.com, schwidefsky@...ibm.com,
        geert@...ux-m68k.org, akpm@...ux-foundation.org,
        andriy.shevchenko@...ux.intel.com, jiri@...lanox.com,
        vgupta@...opsys.com, airlied@...hat.com, jk@...abs.org,
        chris@...is-wilson.co.uk, Jason@...c4.com,
        paulmck@...ux.vnet.ibm.com, ncardwell@...gle.com,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        patches@...ups.riscv.org
Subject: Re: [PATCH v7 15/15] RISC-V: Build Infastructure

On 07/31/2017 06:00 PM, Palmer Dabbelt wrote:
> This patch contains all the build infastructure that actually enables
> the RISC-V port.  This includes Makefiles, linker scripts, and Kconfig
> files.  It also contains the only top-level change, which adds RISC-V to
> the list of architectures that need a sed run to produce the ARCH
> variable when building locally.
> 
> Signed-off-by: Palmer Dabbelt <palmer@...belt.com>
> ---
> 
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> new file mode 100644
> index 000000000000..9b7d077f40af
> --- /dev/null
> +++ b/arch/riscv/Kconfig
> @@ -0,0 +1,275 @@
> +#
> +# For a description of the syntax of this configuration file,
> +# see Documentation/kbuild/kconfig-language.txt.
> +#

[]

drop the "default n" lines below:

> +config CMDLINE_BOOL
> +	bool "Built-in kernel command line"
> +	default n
> +	help
> +	  For most platforms, it is firmware or second stage bootloader
> +	  that by default specifies the kernel command line options.
> +	  However, it might be necessary or advantageous to either override
> +	  the default kernel command line or add a few extra options to it.
> +	  For such cases, this option allows hardcoding command line options
> +	  directly into the kernel.
> +
> +	  For that, choose 'Y' here and fill in the extra boot parameters
> +	  in CONFIG_CMDLINE.
> +
> +	  The built-in options will be concatenated to the default command
> +	  line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
> +	  command line will be ignored and replaced by the built-in string.
> +
> +config CMDLINE
> +	string "Built-in kernel command string"
> +	depends on CMDLINE_BOOL
> +	default ""
> +	help
> +	  Supply command-line options at build time by entering them here.
> +
> +config CMDLINE_OVERRIDE
> +	bool "Built-in command line overrides bootloader arguments"
> +	default n
> +	depends on CMDLINE_BOOL
> +	help
> +	  Set this option to 'Y' to have the kernel ignore the bootloader
> +	  or firmware command line.  Instead, the built-in command line
> +	  will be used exclusively.
> +
> +	  If you don't know what to do here, say N.



-- 
~Randy