diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 6c318f5ac234..2e435b8142e5 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1401,6 +1401,7 @@ static void scan_block(void *_start, void *_end,
 /*
  * Scan a large memory block in MAX_SCAN_SIZE chunks to reduce the latency.
  */
+#ifdef CONFIG_SMP
 static void scan_large_block(void *start, void *end)
 {
 	void *next;
@@ -1412,6 +1413,7 @@ static void scan_large_block(void *start, void *end)
 		cond_resched();
 	}
 }
+#endif
 
 /*
  * Scan a memory block corresponding to a kmemleak_object. A condition is