linux-kernel - Re: [RFC PATCH 1/1] watchdog: fix watchdog_nmi_enable

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Message-ID: <20150417154005.GO98296@redhat.com>
Date:	Fri, 17 Apr 2015 11:40:05 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Ulrich Obergfell <uobergfe@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/1] watchdog: fix watchdog_nmi_enable_all()

On Fri, Apr 17, 2015 at 11:26:36AM +0200, Ulrich Obergfell wrote:
> The 'watchdog_user_enabled' variable is only used as an 'interface'
> to the /proc/sys/kernel/watchdog parameter. The actual state of the
> watchdog is tracked by bits in the 'watchdog_enabled' variable. So,
> watchdog_nmi_enable_all() should check the NMI_WATCHDOG_ENABLED bit
> in 'watchdog_enabled'.

Looks good.  I'll respin this and send to Andrew on Monday.

Cheers,
Don

> 
> Signed-off-by: Ulrich Obergfell <uobergfe@...hat.com>
> ---
>  kernel/watchdog.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/watchdog.c b/kernel/watchdog.c
> index 2316f50..cba2110 100644
> --- a/kernel/watchdog.c
> +++ b/kernel/watchdog.c
> @@ -608,7 +608,7 @@ void watchdog_nmi_enable_all(void)
>  {
>  	int cpu;
>  
> -	if (!watchdog_user_enabled)
> +	if (!(watchdog_enabled & NMI_WATCHDOG_ENABLED))
>  		return;
>  
>  	get_online_cpus();
> -- 
> 1.7.11.7
> 
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