diff --git a/sys/compat/linuxkpi/common/include/linux/shrinker.h b/sys/compat/linuxkpi/common/include/linux/shrinker.h
--- a/sys/compat/linuxkpi/common/include/linux/shrinker.h
+++ b/sys/compat/linuxkpi/common/include/linux/shrinker.h
@@ -51,8 +51,10 @@
 
 int	linuxkpi_register_shrinker(struct shrinker *s);
 void	linuxkpi_unregister_shrinker(struct shrinker *s);
+void	linuxkpi_synchronize_shrinkers(void);
 
 #define	register_shrinker(s)	linuxkpi_register_shrinker(s)
 #define	unregister_shrinker(s)	linuxkpi_unregister_shrinker(s)
+#define	synchronize_shrinkers()	linuxkpi_synchronize_shrinkers()
 
 #endif	/* _LINUXKPI_LINUX_SHRINKER_H_ */
diff --git a/sys/compat/linuxkpi/common/src/linux_shrinker.c b/sys/compat/linuxkpi/common/src/linux_shrinker.c
--- a/sys/compat/linuxkpi/common/src/linux_shrinker.c
+++ b/sys/compat/linuxkpi/common/src/linux_shrinker.c
@@ -64,6 +64,14 @@
 	sx_xunlock(&sx_shrinker);
 }
 
+void
+linuxkpi_synchronize_shrinkers(void)
+{
+
+	sx_xlock(&sx_shrinker);
+	sx_xunlock(&sx_shrinker);
+}
+
 #define	SHRINKER_BATCH	512
 
 static void