diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index b9bcc9d79176..70423345da26 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -62,7 +62,7 @@ static void discard_old_kernel_data(void *kto)
 	__asm__("mcrr	p15, 0, %1, %0, c6	@ 0xec401f06"
 	   :
 	   : "r" (kto),
-	     "r" ((unsigned long)kto + PAGE_SIZE - L1_CACHE_BYTES)
+	     "r" ((unsigned long)kto + PAGE_SIZE - 1)
 	   : "cc");
 }