From patchwork Wed Nov 11 22:17:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 7598321 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 837079F2E9 for ; Wed, 11 Nov 2015 22:24:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8F39120632 for ; Wed, 11 Nov 2015 22:24:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B6EB0201DD for ; Wed, 11 Nov 2015 22:24:09 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZwdlP-0008Bk-9t; Wed, 11 Nov 2015 22:21:11 +0000 Received: from mail-pa0-x22a.google.com ([2607:f8b0:400e:c03::22a]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zwdk5-0006B4-7R for linux-arm-kernel@lists.infradead.org; Wed, 11 Nov 2015 22:20:02 +0000 Received: by pacdm15 with SMTP id dm15so42810191pac.3 for ; Wed, 11 Nov 2015 14:19:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro_org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=BbbETlVP4B0Sg9uZEf7t4oguqh23V9VUk7h2cVXn5nk=; b=WKdcTvGEAxVLFLRL2TXkDf1A+cj3WImTSX1jt4QJCc956HIgPO++PF1qrPh5qAXrm2 H6Rw2yF3is/QwrdQobrSMM2ckvQYln06bP0M+ySoHELH3qsS5C//21iFF+NMP6aHtosj wPgSAKnlHODmCJjQgkmyDSQdDKGyQdV+7SK+DdXRHWB3KHqg/vlozlbxuMFhBZN88XmM XuweCFDg/OrDaAnq8SP2zKiT64JCbFsOYHbJZu4q0NgSEp0cth37EfQop8Y6F7nji0QE Als0Snku/F7l9VeJ3kEe6DrxaA6IQMEqexvEocyTdEy49S5Jd2+XeJDjb91jD1CoNDmb ATYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=BbbETlVP4B0Sg9uZEf7t4oguqh23V9VUk7h2cVXn5nk=; b=CpsE3QyPlgUIEOUYMZgokaEVGW+uxU2xQHZEhc6T9MFnx0pfnktLJFFNghw2UlpWFI IYPspXWQxFGkJLvkkuhM3l8vvtk5+9Cs2pp5QOwyxirGUcGO+5A/DpsoFfQWOzJmMXqP OzZ6dZAu09tVuMOXaYvEyjhY5Zl7oBOIrIzTaLdTpVbNJqURW7MlXfL+aQ3ziSjhdGx3 nMaRot+LpQorIdGGiPXihYKT/HQ01UyO5YaWsLGsA/82qLA6QtNOkJs7q8svVoPryV41 P6z0KL6IeaVv5QsCcVfzLTF+h7LIyYC4JeH/1/38LDp4W3cdoLS0P24ji1UXCzA45jrk anKA== X-Gm-Message-State: ALoCoQnHQtsbD/peZa3xwM0VvYWflxK4nr1e6RaiA14OWKSIsGx1I6oJU5H7Lq9yxCdjGVjQWYLu X-Received: by 10.68.178.1 with SMTP id cu1mr18277900pbc.115.1447280373761; Wed, 11 Nov 2015 14:19:33 -0800 (PST) Received: from t430.cg.shawcable.net ([184.64.168.246]) by smtp.gmail.com with ESMTPSA id h10sm11156697pat.7.2015.11.11.14.19.32 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 11 Nov 2015 14:19:33 -0800 (PST) From: Mathieu Poirier To: gregkh@linuxfoundation.org, a.p.zijlstra@chello.nl, alexander.shishkin@linux.intel.com, acme@kernel.org, mingo@redhat.com, corbet@lwn.net, nicolas.pitre@linaro.org Subject: [PATCH V3 09/26] coresight: add API to get sink from path Date: Wed, 11 Nov 2015 15:17:59 -0700 Message-Id: <1447280296-19147-10-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1447280296-19147-1-git-send-email-mathieu.poirier@linaro.org> References: <1447280296-19147-1-git-send-email-mathieu.poirier@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151111_141949_516412_2F9D3584 X-CRM114-Status: GOOD ( 11.44 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: al.grant@arm.com, mathieu.poirier@linaro.org, pawel.moll@arm.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, fainelli@broadcom.com, adrian.hunter@intel.com, tor@ti.com, mike.leach@arm.com, zhang.chunyan@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an API allowing external code to quickly get a handle on the sink within a path. The sink is always last, but adding an API allows to keep the path's node structure private and remove redundant checks. Signed-off-by: Mathieu Poirier --- drivers/hwtracing/coresight/coresight-priv.h | 1 + drivers/hwtracing/coresight/coresight.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 2dc59a5c5b1e..ed116b303e87 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -60,6 +60,7 @@ static inline void CS_UNLOCK(void __iomem *addr) void coresight_disable_path(struct list_head *path); int coresight_enable_path(struct list_head *path); +struct coresight_device *coresight_get_sink(struct list_head *path); struct list_head *coresight_build_path(struct coresight_device *csdev); void coresight_release_path(struct list_head *path); diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 7e4064b31c99..47a4e109f700 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -322,6 +322,21 @@ err: goto out; } +struct coresight_device *coresight_get_sink(struct list_head *path) +{ + struct coresight_device *csdev; + + if (!path) + return NULL; + + csdev = list_last_entry(path, struct coresight_node, link)->csdev; + if (csdev->type != CORESIGHT_DEV_TYPE_SINK && + csdev->type != CORESIGHT_DEV_TYPE_LINKSINK) + return NULL; + + return csdev; +} + /** * _coresight_build_path - recursively build a path from a @csdev to a sink. * @csdev: The device to start from.