linux-kernel - Re: [PATCH] bootconfig: Fix CONFIG_BOOTTIME

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Date:   Tue, 25 Feb 2020 09:49:25 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] bootconfig: Fix CONFIG_BOOTTIME_TRACING dependency issue

On 2/25/20 6:36 AM, Masami Hiramatsu wrote:
> Since commit d8a953ddde5e ("bootconfig: Set CONFIG_BOOT_CONFIG=n by
> default") also changed the CONFIG_BOOTTIME_TRACING to select
> CONFIG_BOOT_CONFIG to show the boot-time tracing on the menu,
> it introduced wrong dependencies with BLK_DEV_INITRD as below.
> 
> WARNING: unmet direct dependencies detected for BOOT_CONFIG
>   Depends on [n]: BLK_DEV_INITRD [=n]
>   Selected by [y]:
>   - BOOTTIME_TRACING [=y] && TRACING_SUPPORT [=y] && FTRACE [=y] && TRACING [=y]
> 
> This makes the CONFIG_BOOT_CONFIG selects CONFIG_BLK_DEV_INITRD to
> fix this error and make CONFIG_BOOTTIME_TRACING=n by default, so
> that both boot-time tracing and boot configuration off but those
> appear on the menu list.
> 
> Fixes: d8a953ddde5e ("bootconfig: Set CONFIG_BOOT_CONFIG=n by default")
> Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>

Hi,
I'm no fan of "select", but this does fix the kconfig warnings and
build errors that I have reported.  Thanks.

Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

> ---
>  init/Kconfig         |    2 +-
>  kernel/trace/Kconfig |    1 -
>  2 files changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/init/Kconfig b/init/Kconfig
> index a84e7aa89a29..8b4c3e8c05ea 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -1217,7 +1217,7 @@ endif
>  
>  config BOOT_CONFIG
>  	bool "Boot config support"
> -	depends on BLK_DEV_INITRD
> +	select BLK_DEV_INITRD
>  	help
>  	  Extra boot config allows system admin to pass a config file as
>  	  complemental extension of kernel cmdline when booting.
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 795c3e02d3f1..402eef84c859 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -145,7 +145,6 @@ config BOOTTIME_TRACING
>  	bool "Boot-time Tracing support"
>  	depends on TRACING
>  	select BOOT_CONFIG
> -	default y
>  	help
>  	  Enable developer to setup ftrace subsystem via supplemental
>  	  kernel cmdline at boot time for debugging (tracing) driver
> 


-- 
~Randy