From patchwork Mon Nov 30 02:14:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 7720271 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 A2EEB9F3CD for ; Mon, 30 Nov 2015 02:21:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C65AF20561 for ; Mon, 30 Nov 2015 02:21:07 +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 073E520528 for ; Mon, 30 Nov 2015 02:21:07 +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 1a3E3b-0006xD-Gd; Mon, 30 Nov 2015 02:19:11 +0000 Received: from mail-pa0-x22b.google.com ([2607:f8b0:400e:c03::22b]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a3E1Y-0005Wg-Kn for linux-arm-kernel@lists.infradead.org; Mon, 30 Nov 2015 02:17:06 +0000 Received: by padhx2 with SMTP id hx2so168019696pad.1 for ; Sun, 29 Nov 2015 18:16:43 -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=hH/NXzqFazmen+rn0Vm0hR/964DH01oVx4XgQN5C9eo=; b=sB//EUQBk+acWc/+8WubKw1sglbTKPuPaZQZiKruILEHRexg20vqcEZUd4yJfvaZ7Y HOTpkfK+LwAQnxoFT21Kt2CGOwfSr8l5aOcPeDzuQyO44QQ2huHCWuvz/OIeWnr9w+FT IPXX/IjfSeiL9Pw4s27F/UmgYLQOd4DvMD5c278QyvQ9nrPayA+c4LPOgR3HeFJ0Cw8E Vod+uCM9rBn+joAVjyqaxWNKv5JCYxlaE2vklwUGWF2wyVVQGTwgOub8cdr3bUuNkJiH oiLfLTW2voEloDARbv++GVkgNweKOIEU0MhKtKKbD84fi4HVLtexNk+kzpHpmv3vYKKX Lt+Q== 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=hH/NXzqFazmen+rn0Vm0hR/964DH01oVx4XgQN5C9eo=; b=JUV/jtvk6UFAwcuYK7CWrXig8CgIJQ4e3vkJ2iHTmYcHurU1chTag76hSHvUBk8maW 3RulVdAun0AQ0VGJ4NcsSb5Pyg1+SiUGrKKWsZLf9+eSSv6W3UNmRsLyBP1KTOO7HEtg Jb1+t+MXqdStpPmk0aXnwYqmavO/7QEJZ6Qt5YtvZdIWUv5bDLsIxJR1YNJMXuMPDb83 EE7ZyITmYgDeyWnnGbQmY2hD3asw/1IEP2ciXP8/B0V+H6dYGQ4dGx8SdREACiQisAji cBZjjb3B++n3e5mEpHO3xQOpkUOam55AzOlry603dZRVXsoG8/aJ363GjpIrKnxab/Qs qsyQ== X-Gm-Message-State: ALoCoQmwGAZjM7CPTCGdvGlX/1lJOz9iwQvOSE4Gk0gwDFA9D4gqJwkuWOENvRIDYEgJHKxeBhGU X-Received: by 10.98.65.76 with SMTP id o73mr67591076pfa.119.1448849803735; Sun, 29 Nov 2015 18:16:43 -0800 (PST) Received: from t430.cg.shawcable.net ([184.64.168.246]) by smtp.gmail.com with ESMTPSA id n16sm47168818pfa.53.2015.11.29.18.16.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 29 Nov 2015 18:16:43 -0800 (PST) From: Mathieu Poirier To: gregkh@linuxfoundation.org, alexander.shishkin@linux.intel.com Subject: [PATCH V5 09/26] coresight: add API to get sink from path Date: Sun, 29 Nov 2015 19:14:30 -0700 Message-Id: <1448849687-5724-10-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1448849687-5724-1-git-send-email-mathieu.poirier@linaro.org> References: <1448849687-5724-1-git-send-email-mathieu.poirier@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151129_181704_867272_4493ACF6 X-CRM114-Status: GOOD ( 10.84 ) 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 , pawel.moll@arm.com, linux-doc@vger.kernel.org, fainelli@broadcom.com, linux-kernel@vger.kernel.org, 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=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, 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 4e326d792100..c02da2edfd80 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.