From: Shan Wei <shanwei88@gmail.com>
To: dipankar@in.ibm.com, paulmck@linux.vnet.ibm.com,
Kernel-Maillist <linux-kernel@vger.kernel.org>,
cl@linux-foundation.org, Shan Wei <shanwei88@gmail.com>
Subject: [PATCH v3 6/9] rcu: use __this_cpu_read helper instead of per_cpu_ptr(p, raw_smp_processor_id())
Date: Fri, 09 Nov 2012 10:21:34 +0800 [thread overview]
Message-ID: <509C68AE.9090009@gmail.com> (raw)
From: Shan Wei <davidshan@tencent.com>
Signed-off-by: Shan Wei <davidshan@tencent.com>
---
no changes vs v2.
---
kernel/rcutree.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 74df86b..441b945 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_read(rsp->rda->mynode);
for (; rnp != NULL; rnp = rnp->parent) {
ret = (ACCESS_ONCE(rsp->gp_flags) & RCU_GP_FLAG_FQS) ||
!raw_spin_trylock(&rnp->fqslock);
--
1.7.1
next reply other threads:[~2012-11-09 2:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-09 2:21 Shan Wei [this message]
2012-11-09 20:14 ` [PATCH v3 6/9] rcu: use __this_cpu_read helper instead of per_cpu_ptr(p, raw_smp_processor_id()) Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2012-11-13 1:52 Shan Wei
2012-11-16 8:32 ` Shan Wei
2012-11-16 16:43 ` Paul E. McKenney
2012-11-16 17:42 ` Christoph Lameter
2012-11-16 18:09 ` Paul E. McKenney
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