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Subject[PATCH V3 3/6] perf: Add branch_sample_call_stack
Date
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>
---

New patch

arch/x86/events/core.c | 2 +-
include/linux/perf_event.h | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 2919bb5a53a0..b56e9c3a0cc8 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -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;

/*
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index c4877924d43c..58ad6745cdda 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1147,6 +1147,11 @@ static inline bool branch_sample_evt_cntrs(const struct perf_event *event)
return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_EVT_CNTRS;
}

+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,
--
2.35.1
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