Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934683Ab2JaRrK (ORCPT ); Wed, 31 Oct 2012 13:47:10 -0400 Received: from a193-30.smtp-out.amazonses.com ([199.255.193.30]:37846 "EHLO a193-30.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935770Ab2JaRrF (ORCPT ); Wed, 31 Oct 2012 13:47:05 -0400 Date: Wed, 31 Oct 2012 17:47:04 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Shan Wei cc: dipankar@in.ibm.com, paulmck@linux.vnet.ibm.com, Kernel-Maillist Subject: Re: [PATCH 7/9] rcu: use this_cpu_ptr per-cpu helper instead of per_cpu_ptr(p, raw_smp_processor_id()) In-Reply-To: <50910A17.1090600@gmail.com> Message-ID: <0000013ab7eefc03-20a4ba94-f83f-4624-9dac-dfe3924277b4-000000@email.amazonses.com> References: <50910A17.1090600@gmail.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 199.255.193.30 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 902 Lines: 29 On Wed, 31 Oct 2012, Shan Wei wrote: > Signed-off-by: Shan Wei > --- > kernel/rcutree.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/kernel/rcutree.c b/kernel/rcutree.c > index 74df86b..3a21fcf 100644 > --- a/kernel/rcutree.c > +++ b/kernel/rcutree.c > @@ -1960,7 +1960,7 @@ static void force_quiescent_state(struct rcu_state *rsp) > struct rcu_node *rnp_old = NULL; > > /* Funnel through hierarchy to reduce memory contention. */ > - rnp = per_cpu_ptr(rsp->rda, raw_smp_processor_id())->mynode; > + rnp = this_cpu_ptr(rsp->rda)->mynode; Do rnp = this_cpu_read(rsp->rda->mynode); instad. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/