From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Message-ID: <18511.24732.191606.794160@cargo.ozlabs.ibm.com> Date: Wed, 11 Jun 2008 15:20:28 +1000 From: Paul Mackerras To: Nick Piggin Subject: Re: MMIO and gcc re-ordering issue In-Reply-To: <200806101656.51211.nickpiggin@yahoo.com.au> References: <1211852026.3286.36.camel@pasglop> <200806101656.51211.nickpiggin@yahoo.com.au> Cc: linux-arch@vger.kernel.org, Russell King , Matthew Wilcox , linux-kernel@vger.kernel.org, Trent Piepho , linuxppc-dev@ozlabs.org, scottwood@freescale.com, Linus Torvalds , David Miller , alan@lxorguk.ukuu.org.uk List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Nick Piggin writes: > Now that doesn't leave waker ordering architectures lumped with "slow old > x86 semantics". Think of it as giving them the benefit of sharing x86 > development and testing :) Worth something, but not perhaps as much as you think, given that many x86 driver writers still don't pay much attention to making their code endian-safe and 64-bit-clean. And there are still plenty of drivers that use virt_to_bus... Paul.