linux-kernel - Re: [PATCH V3 3/4] ARM: Xilinx: base header files and assembly macros

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Message-Id: <201102171618.44269.arnd@arndb.de>
Date:	Thu, 17 Feb 2011 16:18:44 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	"Russell King - ARM Linux" <linux@....linux.org.uk>
Cc:	John Linn <John.Linn@...inx.com>, Jamie Iles <jamie@...ieiles.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	catalin.marinas@....com, glikely@...retlab.ca
Subject: Re: [PATCH V3 3/4] ARM: Xilinx: base header files and assembly macros

On Thursday 17 February 2011, Russell King - ARM Linux wrote:
> > Actually, for correctness you should use the regular readl/writel, not
> > the __raw_ versions, which can result in reordered or partial accesses
> > on the bus.
> 
> Not in the decompressor.  readl/writel are unsupported there - the
> decompressor doesn't have the L2 cache support code and so the barriers
> necessary for readl/writel cause link errors.

Ah right, of course. Sorry for the confusion.

	Arnd
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