[PATCH v3 05/10] coresight: trbe: Drop duplicate TRUNCATE flags
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: 2021-09-14 10:30:31
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
We mark the buffer as TRUNCATED when there is no space left
in the buffer. But we do it at different points.
__trbe_normal_offset()
and also, at all the callers of the above function via
compute_trbe_buffer_limit(), when the limit == base (i.e
offset = 0 as returned by the __trbe_normal_offset()).
So, given that the callers already mark the buffer as TRUNCATED
drop the caller inside the __trbe_normal_offset().
This is in preparation to moving the handling of TRUNCATED
into a central place.
Cc: Anshuman Khandual <redacted>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <redacted>
Cc: Leo Yan <redacted>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Change since v2:
- Added the flag for trbe_handle_spurious() - Anshuman
---
drivers/hwtracing/coresight/coresight-trbe.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 81bf183a73a1..5297b11f26b7 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c@@ -252,13 +252,9 @@ static unsigned long __trbe_normal_offset(struct perf_output_handle *handle) * trbe_base trbe_base + nr_pages * * Perf aux buffer does not have any space for the driver to write into. - * Just communicate trace truncation event to the user space by marking - * it with PERF_AUX_FLAG_TRUNCATED. */ - if (!handle->size) { - perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED); + if (!handle->size) return 0; - } /* Compute the tail and wakeup indices now that we've aligned head */ tail = PERF_IDX2OFF(handle->head + handle->size, buf);
@@ -360,7 +356,6 @@ static unsigned long __trbe_normal_offset(struct perf_output_handle *handle) return limit; trbe_pad_buf(handle, handle->size); - perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED); return 0; }
@@ -688,6 +683,7 @@ static void trbe_handle_spurious(struct perf_output_handle *handle) buf->trbe_write = buf->trbe_base + PERF_IDX2OFF(handle->head, buf); if (buf->trbe_limit == buf->trbe_base) { trbe_drain_and_disable_local(); + perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED); return; } trbe_enable_hw(buf);
--
2.24.1
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