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@arm.com Signed-off-by: Sai Prakash Ranjan saiprakash.ranjan@codeaurora.org --- 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...