linux-kernel - [PATCH v2 3/3] coresight: Update comments for removing cs_etm_find

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Message-Id: <20210701093537.90759-4-leo.yan@linaro.org>
Date:   Thu,  1 Jul 2021 17:35:37 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        James Clark <James.Clark@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Daniel Kiss <daniel.kiss@....com>,
        Denis Nikitin <denik@...gle.com>
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v2 3/3] coresight: Update comments for removing cs_etm_find_snapshot()

Since the function cs_etm_find_snapshot() has been removed in the user
space, it directly uses the perf common function __auxtrace_mmap__read()
to calcualte the head and size for AUX trace data in snapshot mode.

Updates the comments in drivers to reflect the changes.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 drivers/hwtracing/coresight/coresight-etb10.c   | 2 +-
 drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 +-
 drivers/hwtracing/coresight/coresight-tmc-etr.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index f775cbee12b8..1cdb627d6c38 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -557,7 +557,7 @@ static unsigned long etb_update_buffer(struct coresight_device *csdev,
 
 	/*
 	 * In snapshot mode we simply increment the head by the number of byte
-	 * that were written.  User space function  cs_etm_find_snapshot() will
+	 * that were written.  User space function __auxtrace_mmap__read() will
 	 * figure out how many bytes to get from the AUX buffer based on the
 	 * position of the head.
 	 */
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index 45b85edfc690..fec8ef3694cf 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -546,7 +546,7 @@ static unsigned long tmc_update_etf_buffer(struct coresight_device *csdev,
 
 	/*
 	 * In snapshot mode we simply increment the head by the number of byte
-	 * that were written.  User space function  cs_etm_find_snapshot() will
+	 * that were written.  User space function __auxtrace_mmap__read() will
 	 * figure out how many bytes to get from the AUX buffer based on the
 	 * position of the head.
 	 */
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index b22823d67680..960515e01171 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1555,7 +1555,7 @@ tmc_update_etr_buffer(struct coresight_device *csdev,
 
 	/*
 	 * In snapshot mode we simply increment the head by the number of byte
-	 * that were written.  User space function  cs_etm_find_snapshot() will
+	 * that were written.  User space function __auxtrace_mmap__read() will
 	 * figure out how many bytes to get from the AUX buffer based on the
 	 * position of the head.
 	 */
-- 
2.25.1