From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755182AbbI3Lw5 (ORCPT ); Wed, 30 Sep 2015 07:52:57 -0400 Received: from mga01.intel.com ([192.55.52.88]:55596 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751184AbbI3Lwy (ORCPT ); Wed, 30 Sep 2015 07:52:54 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,612,1437462000"; d="scan'208";a="816255059" From: Alexander Shishkin To: Mathieu Poirier , gregkh@linuxfoundation.org, a.p.zijlstra@chello.nl, acme@kernel.org, mingo@redhat.com, corbet@lwn.net Cc: adrian.hunter@intel.com, zhang.chunyan@linaro.org, mike.leach@arm.com, tor@ti.com, al.grant@arm.com, pawel.moll@arm.com, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 15/20] coresight: etm-perf: implementing 'setup_aux()' API In-Reply-To: <1442593594-10665-16-git-send-email-mathieu.poirier@linaro.org> References: <1442593594-10665-1-git-send-email-mathieu.poirier@linaro.org> <1442593594-10665-16-git-send-email-mathieu.poirier@linaro.org> User-Agent: Notmuch/0.20.2 (http://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu) Date: Wed, 30 Sep 2015 14:50:41 +0300 Message-ID: <87bnckjfce.fsf@ashishki-desk.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mathieu Poirier writes: > +static void *etm_setup_aux(int cpu, void **pages, > + int nr_pages, bool overwrite) > +{ > + struct coresight_device *csdev; > + > + if (cpu == -1) > + cpu = smp_processor_id(); > + > + csdev = per_cpu(csdev_sink, cpu); > + if (!csdev) > + return NULL; > + > + return sink_ops(csdev)->setup_aux(csdev, cpu, pages, > + nr_pages, overwrite); Is it guaranteed that this sink would always have .setup_aux()? Regards, -- Alex