Export is_kernel_event() to be used by coresight drivers
in later changes to check for kernel events and bail out.
Suggested-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
---
include/linux/perf_event.h | 2 ++
kernel/events/core.c | 3 ++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 04a49ccc7beb..230299168f3d 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1415,6 +1415,7 @@ extern void perf_event_task_tick(void);
extern int perf_event_account_interrupt(struct perf_event *event);
extern int perf_event_period(struct perf_event *event, u64 value);
extern u64 perf_event_pause(struct perf_event *event, bool reset);
+extern bool is_kernel_event(struct perf_event *event);
#else /* !CONFIG_PERF_EVENTS: */
static inline void *
perf_aux_output_begin(struct perf_output_handle *handle,
@@ -1507,6 +1508,7 @@ static inline u64 perf_event_pause(struct perf_event *event, bool reset)
{
return 0;
}
+static bool is_kernel_event(struct perf_event *event) { return false; }
#endif
#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 7ed5248f0445..e5db79961a2c 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -173,10 +173,11 @@ static void perf_ctx_unlock(struct perf_cpu_context *cpuctx,
#define TASK_TOMBSTONE ((void *)-1L)
-static bool is_kernel_event(struct perf_event *event)
+bool is_kernel_event(struct perf_event *event)
{
return READ_ONCE(event->owner) == TASK_TOMBSTONE;
}
+EXPORT_SYMBOL_GPL(is_kernel_event);
/*
* On task ctx scheduling...
--
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