From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757166Ab3ETOlV (ORCPT ); Mon, 20 May 2013 10:41:21 -0400 Received: from e36.co.us.ibm.com ([32.97.110.154]:37261 "EHLO e36.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756660Ab3ETOlS (ORCPT ); Mon, 20 May 2013 10:41:18 -0400 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com, sbw@mit.edu, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 3/8] rcu: Rename note_new_gpnum() to note_gp_changes() Date: Mon, 20 May 2013 07:38:10 -0700 Message-Id: <1369060695-29679-3-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1369060695-29679-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20130520143739.GA29365@linux.vnet.ibm.com> <1369060695-29679-1-git-send-email-paulmck@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13052014-7606-0000-0000-00000B91DEFC Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" Because note_new_gpnum() now also checks for the ends of old grace periods, this commit changes its name to note_gp_changes(). Later commits will merge rcu_process_gp_end() into note_gp_changes(). Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- kernel/rcutree.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 46f3062..2f40b4d 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1307,7 +1307,7 @@ __rcu_process_gp_end(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_dat * ->lock of the leaf rcu_node structure corresponding to the current CPU, * and must have irqs disabled. */ -static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp) +static void __note_gp_changes(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp) { /* Handle the ends of any preceding grace periods first. */ __rcu_process_gp_end(rsp, rnp, rdp); @@ -1326,19 +1326,20 @@ static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct } } -static void note_new_gpnum(struct rcu_state *rsp, struct rcu_data *rdp) +static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp) { unsigned long flags; struct rcu_node *rnp; local_irq_save(flags); rnp = rdp->mynode; - if (rdp->gpnum == ACCESS_ONCE(rnp->gpnum) || /* outside lock. */ + if ((rdp->gpnum == ACCESS_ONCE(rnp->gpnum) && + rdp->completed == ACCESS_ONCE(rnp->completed)) || /* w/out lock. */ !raw_spin_trylock(&rnp->lock)) { /* irqs already off, so later. */ local_irq_restore(flags); return; } - __note_new_gpnum(rsp, rnp, rdp); + __note_gp_changes(rsp, rnp, rdp); raw_spin_unlock_irqrestore(&rnp->lock, flags); } @@ -1377,7 +1378,7 @@ check_for_new_grace_period(struct rcu_state *rsp, struct rcu_data *rdp) local_irq_save(flags); if (rdp->gpnum != rsp->gpnum) { - note_new_gpnum(rsp, rdp); + note_gp_changes(rsp, rdp); ret = 1; } local_irq_restore(flags); @@ -1396,7 +1397,7 @@ rcu_start_gp_per_cpu(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_dat __rcu_process_gp_end(rsp, rnp, rdp); /* Set state so that this CPU will detect the next quiescent state. */ - __note_new_gpnum(rsp, rnp, rdp); + __note_gp_changes(rsp, rnp, rdp); } /* -- 1.8.1.5