linux-kernel - [PATCH 1/8] drivers/random: Cache align ip

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Message-ID: <20110316022804.27679.qmail@science.horizon.com>
Date:	Sun, 13 Mar 2011 20:20:44 -0400
From:	George Spelvin <linux@...izon.com>
To:	penberg@...helsinki.fi, herbert@...dor.apana.org.au,
	mpm@...enic.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org, linux@...izon.com
Subject: [PATCH 1/8] drivers/random: Cache align ip_random better

Cache aligning the secret[] buffer makes copying from it infinitesimally
more efficient.
---
 drivers/char/random.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 72a4fcb..4bcc4f2 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1417,8 +1417,8 @@ static __u32 twothirdsMD4Transform(__u32 const buf[4], __u32 const in[12])
 #define HASH_MASK ((1 << HASH_BITS) - 1)
 
 static struct keydata {
-	__u32 count; /* already shifted to the final position */
 	__u32 secret[12];
+	__u32 count; /* already shifted to the final position */
 } ____cacheline_aligned ip_keydata[2];
 
 static unsigned int ip_cnt;
-- 
1.7.4.1

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