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authorLeo Yan <leo.yan@linaro.org>2021-09-12 20:57:48 +0800
committerMathieu Poirier <mathieu.poirier@linaro.org>2021-10-27 11:44:50 -0600
commit7ba7ae1d5a4737ebea582526ada9d79c74dfd75d (patch)
treee003069e084e24c50a7408be5a566bbb12d76ce9 /drivers/hwtracing
parentf36dec8da1a4a083c51e4d2297985d3648b6740f (diff)
downloadlinux-7ba7ae1d5a4737ebea582526ada9d79c74dfd75d.tar.bz2
coresight: Update comments for removing cs_etm_find_snapshot()
Commit 2f01c200d440 ("perf cs-etm: Remove callback cs_etm_find_snapshot()") has removed the function cs_etm_find_snapshot() from the perf tool in the user space, now CoreSight trace directly uses the perf common function __auxtrace_mmap__read() to calcualte the head and size for AUX trace data in snapshot mode. This patch updates the comments in drivers to make them generic and not stick to any specific function from perf tool. Signed-off-by: Leo Yan <leo.yan@linaro.org> Link: https://lore.kernel.org/r/20210912125748.2816606-3-leo.yan@linaro.org Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-etb10.c5
-rw-r--r--drivers/hwtracing/coresight/coresight-tmc-etf.c5
-rw-r--r--drivers/hwtracing/coresight/coresight-tmc-etr.c5
3 files changed, 6 insertions, 9 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index f775cbee12b8..efa39820acec 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -557,9 +557,8 @@ 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
- * figure out how many bytes to get from the AUX buffer based on the
- * position of the head.
+ * that were written. User space will figure out how many bytes to get
+ * from the AUX buffer based on the position of the head.
*/
if (buf->snapshot)
handle->head += to_read;
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index 8debd4f40f06..4c4cbd1f7258 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -546,9 +546,8 @@ 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
- * figure out how many bytes to get from the AUX buffer based on the
- * position of the head.
+ * that were written. User space will figure out how many bytes to get
+ * from the AUX buffer based on the position of the head.
*/
if (buf->snapshot)
handle->head += to_read;
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index 14a86a232a18..d6da38e7c682 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1556,9 +1556,8 @@ 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
- * figure out how many bytes to get from the AUX buffer based on the
- * position of the head.
+ * that were written. User space will figure out how many bytes to get
+ * from the AUX buffer based on the position of the head.
*/
if (etr_perf->snapshot)
handle->head += size;