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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2019-06-21 01:12:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-03 22:15:33 +0300 |
| commit | 730766bae3280a25d40ea76a53dc6342e84e6513 (patch) | |
| tree | 0b687dc2d4112f9728440c5cf52af1ad4dcb7268 /scripts/tracing | |
| parent | 024c1fd9dbcc1d8a847f1311f999d35783921b7f (diff) | |
| download | linux-730766bae3280a25d40ea76a53dc6342e84e6513.tar.xz | |
coresight: etb10: Do not call smp_processor_id from preemptible
During a perf session we try to allocate buffers on the "node" associated
with the CPU the event is bound to. If it is not bound to a CPU, we
use the current CPU node, using smp_processor_id(). However this is unsafe
in a pre-emptible context and could generate the splats as below :
BUG: using smp_processor_id() in preemptible [00000000] code: perf/2544
Use NUMA_NO_NODE hint instead of using the current node for events
not bound to CPUs.
Fixes: 2997aa4063d97fdb39 ("coresight: etb10: implementing AUX API")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: stable <stable@vger.kernel.org> # 4.6+
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20190620221237.3536-5-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/tracing')
0 files changed, 0 insertions, 0 deletions