From: Shan Wei <shanwei88@gmail.com>
To: steffen.klassert@secunet.com, David Miller <davem@davemloft.net>,
NetDev <netdev@vger.kernel.org>,
Herbert Xu <herbert@gondor.hengli.com.au>,
Kernel-Maillist <linux-kernel@vger.kernel.org>,
cl@linux-foundation.org
Subject: [PATCH v2 3/9] net: xfrm: use __this_cpu_read per-cpu helper
Date: Sat, 03 Nov 2012 00:01:24 +0800 [thread overview]
Message-ID: <5093EE54.3020607@gmail.com> (raw)
From: Shan Wei <davidshan@tencent.com>
Signed-off-by: Shan Wei <davidshan@tencent.com>
---
net/xfrm/xfrm_ipcomp.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/net/xfrm/xfrm_ipcomp.c b/net/xfrm/xfrm_ipcomp.c
index e5246fb..394d672 100644
--- a/net/xfrm/xfrm_ipcomp.c
+++ b/net/xfrm/xfrm_ipcomp.c
@@ -276,14 +276,13 @@ static struct crypto_comp * __percpu *ipcomp_alloc_tfms(const char *alg_name)
struct crypto_comp * __percpu *tfms;
int cpu;
- /* This can be any valid CPU ID so we don't need locking. */
- cpu = raw_smp_processor_id();
-
list_for_each_entry(pos, &ipcomp_tfms_list, list) {
struct crypto_comp *tfm;
tfms = pos->tfms;
- tfm = *per_cpu_ptr(tfms, cpu);
+
+ /* This can be any valid CPU ID so we don't need locking. */
+ tfm = __this_cpu_read(tfms);
if (!strcmp(crypto_comp_name(tfm), alg_name)) {
pos->users++;
--
1.7.1
reply other threads:[~2012-11-02 16:01 UTC|newest]
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