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-rw-r--r--include/linux/latencytop.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/latencytop.h b/include/linux/latencytop.h
index 901c2d6377a..b0e99898527 100644
--- a/include/linux/latencytop.h
+++ b/include/linux/latencytop.h
@@ -9,6 +9,7 @@
#ifndef _INCLUDE_GUARD_LATENCYTOP_H_
#define _INCLUDE_GUARD_LATENCYTOP_H_
+#include <linux/compiler.h>
#ifdef CONFIG_LATENCYTOP
#define LT_SAVECOUNT 32
@@ -24,7 +25,14 @@ struct latency_record {
struct task_struct;
-void account_scheduler_latency(struct task_struct *task, int usecs, int inter);
+extern int latencytop_enabled;
+void __account_scheduler_latency(struct task_struct *task, int usecs, int inter);
+static inline void
+account_scheduler_latency(struct task_struct *task, int usecs, int inter)
+{
+ if (unlikely(latencytop_enabled))
+ __account_scheduler_latency(task, usecs, inter);
+}
void clear_all_latency_tracing(struct task_struct *p);