Required to use it in modular perf drivers.Signed-off-by: Thomas Gleixner <tglx@linutronix.de>--- kernel/events/core.c | 1 + 1 file changed, 1 insertion(+)--- a/kernel/events/core.c+++ b/kernel/events/core.c@@ -9335,6 +9335,7 @@ ssize_t perf_event_sysfs_show(struct dev return 0; }+EXPORT_SYMBOL(perf_event_sysfs_show); static int __init perf_event_sysfs_init(void) {