[PATCH] mm/kasan: Fix an compile error

[zhong jiang <zhongjiang@xxxxxxxxxx>]

I hit the following compile error in arch/x86/

mm/kasan/common.c: In function kasan_populate_vmalloc:
mm/kasan/common.c:797:2: error: implicit declaration of function flush_cache_vmap; did you mean flush_rcu_work? [-Werror=implicit-function-declaration]
  flush_cache_vmap(shadow_start, shadow_end);
  ^~~~~~~~~~~~~~~~
  flush_rcu_work
cc1: some warnings being treated as errors
make[2]: *** [mm/kasan/common.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [mm/kasan] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [mm] Error 2
make: *** Waiting for unfinished jobs....

Fixes: 3c5c3cfb9ef4 ("kasan: support backing vmalloc space with real shadow memory")
Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx>
---
 mm/kasan/common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index df3371d..2fa710b 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -36,6 +36,7 @@
 #include <linux/bug.h>
 #include <linux/uaccess.h>
 
+#include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 
 #include "kasan.h"
-- 
1.7.12.4