diff options
| author | James Clark <james.clark@arm.com> | 2024-07-22 11:11:57 +0100 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2024-08-20 15:02:38 +0100 |
| commit | de0029fdde86092c75472c92e56a962f4edee0f6 (patch) | |
| tree | a73207d94509a16793fb234c5015c8e8357143fd /include/linux/coresight.h | |
| parent | 5ad628a7617607baac53745f8025638b967470a2 (diff) | |
coresight: Remove pending trace ID release mechanism
Pending the release of IDs was a way of managing concurrent sysfs and
Perf sessions in a single global ID map. Perf may have finished while
sysfs hadn't, and Perf shouldn't release the IDs in use by sysfs and
vice versa.
Now that Perf uses its own exclusive ID maps, pending release doesn't
result in any different behavior than just releasing all IDs when the
last Perf session finishes. As part of the per-sink trace ID change, we
would have still had to make the pending mechanism work on a per-sink
basis, due to the overlapping ID allocations, so instead of making that
more complicated, just remove it.
Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20240722101202.26915-16-james.clark@linaro.org
Diffstat (limited to 'include/linux/coresight.h')
| -rw-r--r-- | include/linux/coresight.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 9c3067e2e38b..197949fd2c35 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -227,14 +227,12 @@ struct coresight_sysfs_link { * @used_ids: Bitmap to register available (bit = 0) and in use (bit = 1) IDs. * Initialised so that the reserved IDs are permanently marked as * in use. - * @pend_rel_ids: CPU IDs that have been released by the trace source but not - * yet marked as available, to allow re-allocation to the same - * CPU during a perf session. + * @perf_cs_etm_session_active: Number of Perf sessions using this ID map. */ struct coresight_trace_id_map { DECLARE_BITMAP(used_ids, CORESIGHT_TRACE_IDS_MAX); - DECLARE_BITMAP(pend_rel_ids, CORESIGHT_TRACE_IDS_MAX); atomic_t __percpu *cpu_map; + atomic_t perf_cs_etm_session_active; }; /** |