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-rw-r--r--kernel/semaphore.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index 5c2942e768c..aaaeae8244e 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -31,6 +31,7 @@
#include <linux/sched.h>
#include <linux/semaphore.h>
#include <linux/spinlock.h>
+#include <linux/ftrace.h>
static noinline void __down(struct semaphore *sem);
static noinline int __down_interruptible(struct semaphore *sem);