Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753998AbdCFLXP (ORCPT ); Mon, 6 Mar 2017 06:23:15 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:41765 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753878AbdCFLXB (ORCPT ); Mon, 6 Mar 2017 06:23:01 -0500 Date: Mon, 6 Mar 2017 12:22:28 +0100 From: Peter Zijlstra To: Madhavan Srinivasan Cc: mpe@ellerman.id.au, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Sukadev Bhattiprolu , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Wang Nan , Alexei Starovoitov , Stephane Eranian Subject: Re: [PATCH v2 1/6] powerpc/perf: Define big-endian version of perf_mem_data_src Message-ID: <20170306112228.GZ6515@twins.programming.kicks-ass.net> References: <1488796993-25495-1-git-send-email-maddy@linux.vnet.ibm.com> <1488796993-25495-2-git-send-email-maddy@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1488796993-25495-2-git-send-email-maddy@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 418 Lines: 8 On Mon, Mar 06, 2017 at 04:13:08PM +0530, Madhavan Srinivasan wrote: > From: Sukadev Bhattiprolu > > perf_mem_data_src is an union that is initialized via the ->val field > and accessed via the bitmap fields. For this to work on big endian > platforms, we also need a big-endian represenation of perf_mem_data_src. Doesn't this break interpreting the data on a different endian machine?