linux-kernel - Re: [PATCH 6/8] PM: Add suspend blocking work.

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Message-ID: <20100428060659.GC3721@ucw.cz>
Date:	Wed, 28 Apr 2010 08:06:59 +0200
From:	Pavel Machek <pavel@....cz>
To:	Arve Hj??nnev??g <arve@...roid.com>
Cc:	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alan Stern <stern@...land.harvard.edu>,
	Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 6/8] PM: Add suspend blocking work.

Hi!

> Allow work to be queued that will block suspend while it is pending
> or executing. To get the same functionality in the calling code often
> requires a separate suspend_blocker for pending and executing work, or
> additional state and locking. This implementation does add additional
> state and locking, but this can be removed later if we add support for
> suspend blocking work to the core workqueue code.
> 
> Signed-off-by: Arve Hj??nnev??g <arve@...roid.com>

Seems sane. ACK.

> +struct suspend_blocking_work {
> +	struct work_struct work;
> +#ifdef CONFIG_OPPORTUNISTIC_SUSPEND

Cound we name it C_AUTO_SUSPEND... to reduce length and typo
potential?

> +	struct suspend_blocker suspend_blocker;
> +	work_func_t func;
> +	spinlock_t lock;
> +	int active;

Is the lock internal-use, or is API user allowed to use it?
								Pavel

-- 
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