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[184.64.168.246]) by smtp.gmail.com with ESMTPSA id xi7sm21737967pbc.56.2015.11.13.10.46.28 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 13 Nov 2015 10:46:29 -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 V4 09/26] coresight: add API to get sink from path Date: Fri, 13 Nov 2015 11:45:00 -0700 Message-Id: <1447440317-1977-10-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1447440317-1977-1-git-send-email-mathieu.poirier@linaro.org> References: <1447440317-1977-1-git-send-email-mathieu.poirier@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151113_104649_565640_6A5515A9 X-CRM114-Status: GOOD ( 11.37 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2607:f8b0:400e:c03:0:0:0:22f listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 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+patch=linaro.org@lists.infradead.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(+) -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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.