diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9419aa4..2abf8d5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1587,6 +1587,10 @@
 	/* Reinit limits that are based on free pages after the kernel is up */
 	files_maxfiles_init();
 #endif
+#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
+	/* Discard memblock private memory */
+	memblock_discard();
+#endif
 
 	for_each_populated_zone(zone)
 		set_zone_contiguous(zone);