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Date:	Tue, 9 Jun 2015 22:07:51 +0200
From:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To:	Stefan Agner <stefan@...er.ch>
Cc:	dwmw2@...radead.org, computersforpeace@...il.com,
	mark.rutland@....com, boris.brezillon@...e-electrons.com,
	aaron@...tycactus.com, marb@...at.de, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, robh+dt@...nel.org,
	linux-mtd@...ts.infradead.org, kernel@...gutronix.de,
	galak@...eaurora.org, shawn.guo@...aro.org,
	linux-arm-kernel@...ts.infradead.org, bpringlemeir@...ps.com
Subject: Re: [PATCH v4 1/6] mtd: nand: vf610_nfc: Freescale NFC for VF610,
 MPC5125 and others

On 2015-06-03 17:05:16 [+0200], Stefan Agner wrote:
> As Boris guessed correctly, the reason I used the raw variant was due to
> performance improvements due to the barrier. However, I will use

yeah, do you have any numbers by chance?

> {read|write}l_relaxed instead, which should offer endian abstraction
> while not having the performance penalty due to extensive barriers...

well, even those
|$ git grep readl_relaxed arch/powerpc/
|arch/powerpc/include/asm/io.h:#define readl_relaxed(addr) readl(addr)

have the endian swap. So an abstraction like you provided earlier
would be nice :)

> --
> Stefan

Sebastian
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