linux-kernel - Re: [PATCH 2/4] watchdog: introduce watchdog_suspend() and watchdog

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Message-ID: <20150801140416.GA31835@roeck-us.net>
Date:	Sat, 1 Aug 2015 07:04:16 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Ulrich Obergfell <uobergfe@...hat.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	dzickus@...hat.com, atomlin@...hat.com, jolsa@...nel.org,
	mhocko@...e.cz, eranian@...gle.com, cmetcalf@...hip.com,
	fweisbec@...il.com
Subject: Re: [PATCH 2/4] watchdog: introduce watchdog_suspend() and
 watchdog_resume()

On Sat, Aug 01, 2015 at 02:49:23PM +0200, Ulrich Obergfell wrote:
> This interface can be utilized to deactivate the hard and soft lockup
> detector temporarily. Callers are expected to minimize the duration of
> deactivation. Multiple deactivations are allowed to occur in parallel
> but should be rare in practice.
> 
> Signed-off-by: Ulrich Obergfell <uobergfe@...hat.com>
> ---
>  include/linux/nmi.h |  2 ++
>  kernel/watchdog.c   | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 67 insertions(+)
> 
> diff --git a/include/linux/nmi.h b/include/linux/nmi.h
> index f94da0e..60050c2 100644
> --- a/include/linux/nmi.h
> +++ b/include/linux/nmi.h
> @@ -80,6 +80,8 @@ extern int proc_watchdog_thresh(struct ctl_table *, int ,
>  				void __user *, size_t *, loff_t *);
>  extern int proc_watchdog_cpumask(struct ctl_table *, int,
>  				 void __user *, size_t *, loff_t *);
> +extern int watchdog_suspend(void);
> +extern void watchdog_resume(void);

How about nmi_watchdog_enable() and nmi_watchdog_disable() to avoid confusion
with the watchdog subsystem ?

Thanks,
Guenter
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