diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 251613449dd6..510ff4091667 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -9,6 +9,14 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 
+void clflush_cache_range(void *addr, int size)
+{
+	int i;
+
+	for (i = 0; i < size; i += boot_cpu_data.x86_clflush_size)
+		clflush(addr+i);
+}
+
 #include <asm/processor.h>
 #include <asm/tlbflush.h>
 #include <asm/sections.h>