diff --git a/mm/bootmem.c b/mm/bootmem.c
index 142c84a..bde170dd 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -526,6 +526,12 @@
 }
 
 #ifndef CONFIG_NO_BOOTMEM
+int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
+				   int flags)
+{
+	return reserve_bootmem(phys, len, flags);
+}
+
 static unsigned long __init align_idx(struct bootmem_data *bdata,
 				      unsigned long idx, unsigned long step)
 {