From 5cce8c33cabd92afecfb0ec31f841d3082d15b3d Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Thu, 7 Apr 2016 19:05:30 -0400
Subject: [PATCH] Improve performance of fix to Issue 146

---
 rijndael.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rijndael.cpp b/rijndael.cpp
index 92f9dea8..547a1990 100644
--- a/rijndael.cpp
+++ b/rijndael.cpp
@@ -391,7 +391,8 @@ void Rijndael::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock
 	// timing attack countermeasure. see comments at top for more details
 	const int cacheLineSize = GetCacheLineSize();
 	unsigned int i;
-	volatile word32 u = 0;
+	volatile word32 _u = 0;
+	word32 u = _u;
 #if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
 	for (i=0; i<2048; i+=cacheLineSize)
 #else