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[209.132.180.67]) by mx.google.com with ESMTP id p23si10795133pfj.199.2016.02.03.10.52.31; Wed, 03 Feb 2016 10:52:31 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dkim=pass header.i=@linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966163AbcBCSw1 (ORCPT + 30 others); Wed, 3 Feb 2016 13:52:27 -0500 Received: from mail-pf0-f169.google.com ([209.85.192.169]:33996 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965169AbcBCSji (ORCPT ); Wed, 3 Feb 2016 13:39:38 -0500 Received: by mail-pf0-f169.google.com with SMTP id o185so18054761pfb.1 for ; Wed, 03 Feb 2016 10:39:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Lh1lJBYmbnWY6VobiR54+G7OxcYmHX43ZupCIuDFyqQ=; b=L/+ctyxbrEKRpp4dOPWrr4WVzwG4wCR/NotIR1oKuiwCxXBdWbSeOOA9RKtmjbRbwd MNHiOXlAao6WQqiGVly/amfBU241B3PNNA5KK7gXxSx397wvKXNpxQo5k89l81FHq3aB eLY6CT4F5UXQMgillng3U+q7p3Z7+33vFT904= 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=Lh1lJBYmbnWY6VobiR54+G7OxcYmHX43ZupCIuDFyqQ=; b=IZ3kQqULgM8X7CYTxOMUCR8lTzQJUOGqmfXM50X4sw5sLOz2Oc/zh3r855CSXHG5ZB iDLDx29PASqu5cO8JDwsMre/pPaGYO7NFjW/WvbxYAsXmQ09Zxi0MLisryaarzO4Xpgz ORfR507L9ouGLCFgq8t6aDS+Yifc8JM3W+ysbViamJareDh+gzm0JX+0fiMHkuiEqej+ oLUx+G5o6hvT/n6h2NVWFkA5MKsr6f2vZVlKLb1rSjDL4BR+zphSgDsQiONQDwCOqeb8 7joKa225mJzpOcgoC857CUyJ0uE6hoLqNVm+orp5Rucsc+MJrzo1U5zeVAo9uSxp/6cP /AnA== X-Gm-Message-State: AG10YOQz5hVUvn3sMtuqjSRfwVbGhavg2iapj1s9D1qTuasfQiKVCtEDeRzwWKIsU8mbp0aH X-Received: by 10.98.19.205 with SMTP id 74mr4592756pft.31.1454524778221; Wed, 03 Feb 2016 10:39:38 -0800 (PST) Received: from t430.cg.shawcable.net ([184.64.168.246]) by smtp.gmail.com with ESMTPSA id xa9sm11369704pab.44.2016.02.03.10.39.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 03 Feb 2016 10:39:37 -0800 (PST) From: Mathieu Poirier To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, zhang.chunyan@linaro.org, mike.leach@arm.com, alexander.shishkin@linux.intel.com, tor@ti.com Subject: [PATCH V9 02/18] coresight: add API to get sink from path Date: Wed, 3 Feb 2016 11:39:00 -0700 Message-Id: <1454524756-10628-3-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1454524756-10628-1-git-send-email-mathieu.poirier@linaro.org> References: <1454524756-10628-1-git-send-email-mathieu.poirier@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(+) -- 2.1.4 diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 7b193a34d709..14f245a2018d 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -54,6 +54,7 @@ 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 f26589effb70..2ed48545df26 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -321,6 +321,21 @@ 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.