Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753872AbbFIUII (ORCPT ); Tue, 9 Jun 2015 16:08:08 -0400 Received: from Chamillionaire.breakpoint.cc ([80.244.247.6]:45338 "EHLO Chamillionaire.breakpoint.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751934AbbFIUIE (ORCPT ); Tue, 9 Jun 2015 16:08:04 -0400 Date: Tue, 9 Jun 2015 22:07:51 +0200 From: Sebastian Andrzej Siewior To: Stefan Agner Cc: dwmw2@infradead.org, computersforpeace@gmail.com, mark.rutland@arm.com, boris.brezillon@free-electrons.com, aaron@tastycactus.com, marb@ixxat.de, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, linux-mtd@lists.infradead.org, kernel@pengutronix.de, galak@codeaurora.org, shawn.guo@linaro.org, linux-arm-kernel@lists.infradead.org, bpringlemeir@nbsps.com Subject: Re: [PATCH v4 1/6] mtd: nand: vf610_nfc: Freescale NFC for VF610, MPC5125 and others Message-ID: <20150609200751.GC5720@breakpoint.cc> References: <1427300909-20825-1-git-send-email-stefan@agner.ch> <1427300909-20825-2-git-send-email-stefan@agner.ch> <20150603130825.GA23991@breakpoint.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 864 Lines: 25 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/