openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

coresight: perf: Refactor function free_event_data() 

Function free_event_data() is already busy and is bound to become
worse with the addition of CPU-wide trace scenarios.  As such spin
off a new function to strickly take care of the sink buffers.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2019-04-25 13:53:00 -06:00 committed by Greg Kroah-Hartman
parent 02d5c897a0
commit f5200aa983
1 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/hwtracing/coresight/coresight-etm-perf.c
View File

@ -120,22 +120,34 @@ static int etm_event_init(struct perf_event *event)
return ret;
}
static void free_sink_buffer(struct etm_event_data *event_data)
{
int cpu;
cpumask_t *mask = &event_data->mask;
struct coresight_device *sink;
if (WARN_ON(cpumask_empty(mask)))
return;
if (!event_data->snk_config)
return;
cpu = cpumask_first(mask);
sink = coresight_get_sink(etm_event_cpu_path(event_data, cpu));
sink_ops(sink)->free_buffer(event_data->snk_config);
}
static void free_event_data(struct work_struct *work)
{
int cpu;
cpumask_t *mask;
struct etm_event_data *event_data;
struct coresight_device *sink;
event_data = container_of(work, struct etm_event_data, work);
mask = &event_data->mask;
/* Free the sink buffers, if there are any */
if (event_data->snk_config && !WARN_ON(cpumask_empty(mask))) {
cpu = cpumask_first(mask);
sink = coresight_get_sink(etm_event_cpu_path(event_data, cpu));
sink_ops(sink)->free_buffer(event_data->snk_config);
}
free_sink_buffer(event_data);
for_each_cpu(cpu, mask) {
struct list_head **ppath;