linux-kernel - Re: [PATCH] adjust hard-lockup related Kconfig options

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Message-ID: <20120910133251.GK2151@redhat.com>
Date:	Mon, 10 Sep 2012 09:32:51 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Jan Beulich <JBeulich@...e.com>
Cc:	akpm@...ux-foundation.org, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] adjust hard-lockup related Kconfig options

On Mon, Sep 10, 2012 at 12:54:07PM +0100, Jan Beulich wrote:
> The main option should not appear in the resulting .config when the
> dependencies aren't met (i.e. use "depends on" rather than directly
> setting the default from the combined dependency values).
> 
> The sub-options should depend on the main option rather than a more
> generic higher level one.

Looks good to me.

Acked-by: Don Zickus <dzickus@...hat.com>

> 
> Signed-off-by: Jan Beulich <jbeulich@...e.com>
> Cc: Don Zickus <dzickus@...hat.com>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> 
> ---
>  lib/Kconfig.debug |    9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> --- 3.6-rc5/lib/Kconfig.debug
> +++ 3.6-rc5-kconfig-cleanup-hardlockup/lib/Kconfig.debug
> @@ -196,12 +196,13 @@ config LOCKUP_DETECTOR
>  	  thresholds can be controlled through the sysctl watchdog_thresh.
>  
>  config HARDLOCKUP_DETECTOR
> -	def_bool LOCKUP_DETECTOR && PERF_EVENTS && HAVE_PERF_EVENTS_NMI && \
> -		 !HAVE_NMI_WATCHDOG
> +	def_bool y
> +	depends on LOCKUP_DETECTOR && !HAVE_NMI_WATCHDOG
> +	depends on PERF_EVENTS && HAVE_PERF_EVENTS_NMI
>  
>  config BOOTPARAM_HARDLOCKUP_PANIC
>  	bool "Panic (Reboot) On Hard Lockups"
> -	depends on LOCKUP_DETECTOR
> +	depends on HARDLOCKUP_DETECTOR
>  	help
>  	  Say Y here to enable the kernel to panic on "hard lockups",
>  	  which are bugs that cause the kernel to loop in kernel
> @@ -212,7 +213,7 @@ config BOOTPARAM_HARDLOCKUP_PANIC
>  
>  config BOOTPARAM_HARDLOCKUP_PANIC_VALUE
>  	int
> -	depends on LOCKUP_DETECTOR
> +	depends on HARDLOCKUP_DETECTOR
>  	range 0 1
>  	default 0 if !BOOTPARAM_HARDLOCKUP_PANIC
>  	default 1 if BOOTPARAM_HARDLOCKUP_PANIC
> 
> 
> 
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