linux-kernel - Re: Async resume patch (was: Re: [GIT PULL] PM updates for 2.6.33)

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Message-ID: <Pine.LNX.4.44L0.0912081633540.3046-100000@iolanthe.rowland.org>
Date:	Tue, 8 Dec 2009 16:40:05 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Zhang Rui <rui.zhang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: Async resume patch (was: Re: [GIT PULL] PM updates for 2.6.33)

On Tue, 8 Dec 2009, Rafael J. Wysocki wrote:

> BTW, is there a good reason why completion_done() doesn't use spin_lock_irqsave
> and spin_unlock_irqrestore?  complete() and complete_all() use them, so why not
> here?

And likewise in try_wait_for_completion().  It looks like a bug.  Maybe 
these routines were not intended to be called with interrupts disabled, 
but that requirement doesn't seem to be documented.  And it isn't a 
natural requirement anyway.

Alan Stern

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