linux-kernel - Re: [PATCH 1/9] PM: Add suspend block api.

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Message-ID: <l2sd6200be21004232014r806b0c67ucf5508ac7ff50a44@mail.gmail.com>
Date:	Fri, 23 Apr 2010 20:14:19 -0700
From:	Arve Hjønnevåg <arve@...roid.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Randy Dunlap <rdunlap@...otime.net>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Nigel Cunningham <nigel@...onice.net>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Ming Lei <tom.leiming@...il.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH 1/9] PM: Add suspend block api.

2010/4/23 Alan Stern <stern@...land.harvard.edu>:
> On Fri, 23 Apr 2010, Arve Hjønnevåg wrote:
>
>> 2010/4/23 Alan Stern <stern@...land.harvard.edu>:
>> > On Thu, 22 Apr 2010, [UTF-8] Arve Hjønnevåg wrote:
>> ...
>> >> +Calling suspend_block when the suspend blocker is active or suspend_unblock when
>> >> +it is not active has no effect. This allows drivers to update their state and
>> >> +call suspend suspend_block or suspend_unblock based on the result.
>> >
>> > But suspend_block() and suspend_unblock() don't nest.  You should
>> > mention this.
>> >
>>
>> I'm not sure what you mean by this? I think the first sentence
>> dictates nesting is not supported.
>
> That fact is implicit from the first sentence.  Mentioning it
> _explicitly_ will help people to understand more easily.  You don't
> have to add much; a parenthetical remark would be enough:
>
>        Calling suspend_block when the suspend blocker is active or
>        suspend_unblock when it is not active has no effect (i.e.,
>        these functions don't nest).  This allows drivers to ...
>

OK.

-- 
Arve Hjønnevåg
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