Fix mkinitrd, add vfs_initrd stub
diff --git a/src/kernel/vfs_initrd.h b/src/kernel/vfs_initrd.h
index 91959d6..a76288c 100644
--- a/src/kernel/vfs_initrd.h
+++ b/src/kernel/vfs_initrd.h
@@ -1,3 +1,7 @@
 #pragma once
 
-void init_initrd_vfs();
+#include "kint.h"
+
+/* Note: this requires virtual memory to be set up,
+ * this WILL call malloc() */
+void init_initrd_vfs(uchar *data);