linux-kernel - RE: [PATCH 15/21] staging: comedi/dawboard2000: use mdelay for large delays

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Date:	Tue, 23 Apr 2013 11:46:46 -0500
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ian Abbott <abbotti@....co.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: RE: [PATCH 15/21] staging: comedi/dawboard2000: use mdelay for
 large delays

On Tuesday, April 23, 2013 9:31 AM, Arnd Bergmann wrote:
> Subject: [PATCH 15/21] staging: comedi/dawboard2000: use mdelay for large delays

Nit.. Typo in subject.

> On ARM, it is not legal to pass values larger than 2ms into udelay(),
> and mdelay() must be used instead, to avoid this build error:
>
> ERROR: "__bad_udelay" [drivers/staging/comedi/drivers/daqboard2000.ko]
> undefined!
>
> On a related note, any use of mdelay() or large udelay() numbers should
> be carefully reviewed, and replaced with msleep() or a different
> implementation that does not rely on delaying the work.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Ian Abbott <abbotti@....co.uk>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Reviewed-by: H Hartley Sweeten <hsweeten@...ionengravers.com>

Thanks,
Hartley
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