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 v2 6/9] rcu: use __this_cpu_read helper instead of per_cpu_ptr(p, raw_smp_processor_id())
Date: Sat, 03 Nov 2012 00:01:47 +0800 [thread overview]
Message-ID: <5093EE6B.3070906@gmail.com> (raw)
From: Shan Wei <davidshan@tencent.com>
Signed-off-by: Shan Wei <davidshan@tencent.com>
---
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:[~2012-11-02 16:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-02 16:01 Shan Wei [this message]
2012-11-02 17:46 ` [PATCH v2 6/9] rcu: use __this_cpu_read helper instead of per_cpu_ptr(p, raw_smp_processor_id()) Christoph Lameter
2012-11-02 18:10 ` Paul E. McKenney
2012-11-02 20:19 ` Christoph Lameter
2012-11-03 9:19 ` Paul E. McKenney
2012-11-04 10:38 ` Shan Wei
2012-11-05 14:49 ` Christoph Lameter
[not found] ` <CAPYxyx+eJUWxDJrbOHVRtCchszmj8+BgSkNhpH3gGBJK87OikA@mail.gmail.com>
2012-11-05 15:55 ` Christoph Lameter
2012-11-05 15:23 ` Christoph Lameter
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