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| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2021-09-14 11:26:36 +0100 |
|---|---|---|
| committer |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2021-10-27 11:45:23 -0600 |
| commit | acee3ef86d5cfda094fa9806935aee45833444e3 (patch) | |
| tree | 46f46b02f20aae4775c534fb146dc6bca4278943 /drivers/hwtracing | |
| parent | coresight: trbe: Ensure the format flag is always set (diff) | |
| download | linux-dev-acee3ef86d5cfda094fa9806935aee45833444e3.tar.xz linux-dev-acee3ef86d5cfda094fa9806935aee45833444e3.zip | |
coresight: trbe: Drop duplicate TRUNCATE flags
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 <anshuman.khandual@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20210914102641.1852544-6-suzuki.poulose@arm.com
[Moved comment as Anshuman requested]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-trbe.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index 81bf183a73a1..4479e689c38a 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 +683,11 @@ 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(); + /* + * Just communicate trace truncation event to the user space by + * marking it with PERF_AUX_FLAG_TRUNCATED. + */ + perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED); return; } trbe_enable_hw(buf); |