diff --git a/mm/workingset.c b/mm/workingset.c
index 350f57b0328e..b20fa7601153 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -195,7 +195,7 @@ static void *pack_shadow(int memcgid, pg_data_t *pgdat, unsigned long eviction,
 	return xa_mk_value(eviction);
 }
 
-static void unpack_shadow(void *shadow, int *memcgidp, pg_data_t **pgdat,
+void unpack_shadow(void *shadow, int *memcgidp, pg_data_t **pgdat,
 			  unsigned long *evictionp, bool *workingsetp)
 {
 	unsigned long entry = xa_to_value(shadow);
@@ -214,6 +214,7 @@ static void unpack_shadow(void *shadow, int *memcgidp, pg_data_t **pgdat,
 	*evictionp = entry;
 	*workingsetp = workingset;
 }
+EXPORT_SYMBOL_GPL(unpack_shadow);
 
 #ifdef CONFIG_LRU_GEN