From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751637Ab1CPC2L (ORCPT ); Tue, 15 Mar 2011 22:28:11 -0400 Received: from science.horizon.com ([71.41.210.146]:44009 "HELO science.horizon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751102Ab1CPC2H (ORCPT ); Tue, 15 Mar 2011 22:28:07 -0400 Message-ID: <20110316022804.27679.qmail@science.horizon.com> MBOX-Line: From b5bf6b1aabcedb5b783f8961bdfed82f032d3b5d Mon Sep 17 00:00:00 2001 From: George Spelvin Date: Sun, 13 Mar 2011 20:20:44 -0400 Subject: [PATCH 1/8] drivers/random: Cache align ip_random better To: penberg@cs.helsinki.fi, herbert@gondor.hengli.com.au, mpm@selenic.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux@horizon.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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