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)
 {