From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <61164.94.211.195.167.1301094709.squirrel@gate.crashing.org> In-Reply-To: <4D8C47CD.3020108@ozlabs.org> References: <4D8C47CD.3020108@ozlabs.org> Date: Sat, 26 Mar 2011 00:11:49 +0100 (CET) Subject: Re: [PATCH 3/5] xhci: Add rmb() between reading event validity & event data access. From: "Segher Boessenkool" To: "Matt Evans" MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Cc: sarah.a.sharp@linux.intel.com, linuxppc-dev@ozlabs.org, linux-usb@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > On weakly-ordered systems, the reading of an event's content must occur > after reading the event's validity. Put a comment on the rmb() saying what it orders? Segher