[V5,3/8] perf: Add branch_sample_call_stack
Commit Message
From: Kan Liang <kan.liang@linux.intel.com>
Add a helper function to check call stack sample type.
The later patch will invoke the function in several places.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
No changes since V4
arch/x86/events/core.c | 2 +-
include/linux/perf_event.h | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)
@@ -601,7 +601,7 @@ int x86_pmu_hw_config(struct perf_event *event)
}
}
- if (event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK)
+ if (branch_sample_call_stack(event))
event->attach_state |= PERF_ATTACH_TASK_DATA;
/*
@@ -1144,6 +1144,11 @@ static inline bool branch_sample_counters(const struct perf_event *event)
return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS;
}
+static inline bool branch_sample_call_stack(const struct perf_event *event)
+{
+ return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;
+}
+
struct perf_sample_data {
/*
* Fields set by perf_sample_data_init() unconditionally,