linux-kernel - Re: [PATCH 01/12] misc: vexpress-syscfg: Add udelay-based delay

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Message-ID: <20140215191932.GA2280@kroah.com>
Date:	Sat, 15 Feb 2014 11:19:32 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Pawel Moll <pawel.moll@....com>
Cc:	arm@...nel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 01/12] misc: vexpress-syscfg: Add udelay-based delay

On Tue, Feb 11, 2014 at 05:10:25PM +0000, Pawel Moll wrote:
> It is normally preferable to yield the task
> waiting for syscfg operations (that can take
> up to dozens of milliseconds), but when the
> system is shutting down it may not be possible.

Really?  What happens at shutdown that prevents things from being
scheduled?  Why would you want to busy-loop instead at this point in
time?

thanks,

greg k-h
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