linux-kernel - Re: [PATCH 06/27] score: create head files delay.h device.h div64.h dma-mapping.h dma.h

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Message-ID: <OF676F75F6.AE51CF2E-ON482575D4.00241202-482575D4.0024AEE4@sunplusct.com>
Date:	Sat, 13 Jun 2009 14:36:13 +0800
From:	liqin.chen@...plusct.com
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH 06/27] score: create head files delay.h device.h div64.h
 dma-mapping.h dma.h

Arnd Bergmann <arnd@...db.de> 写于 2009-06-10 01:18:20:

> On Tuesday 09 June 2009, liqin.chen@...plusct.com wrote:
> 
> Having a working udelay() function is required for many
> drivers that are sensitive to timing, you should probably
> implement that at some point in the future.

Add udelay() implement in code.

> 
> This indicates that you allow DMA to certain devices only in the first
> 16MB of memory, like an ISA floppy or parallel port. Do you actually 
have
> any devices with this behaviour?
> 

No, I had removed it.

Best Regards
Liqin
--