--- zzzz-none-000/linux-4.4.60/mm/bootmem.c	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/mm/bootmem.c	2018-11-08 13:36:17.000000000 +0000
@@ -15,6 +15,7 @@
 #include <linux/export.h>
 #include <linux/kmemleak.h>
 #include <linux/range.h>
+#include <linux/crashlog.h>
 #include <linux/memblock.h>
 #include <linux/bug.h>
 #include <linux/io.h>
@@ -177,6 +178,7 @@
 	if (!bdata->node_bootmem_map)
 		return 0;
 
+	crashlog_init_bootmem(bdata);
 	map = bdata->node_bootmem_map;
 	start = bdata->node_min_pfn;
 	end = bdata->node_low_pfn;