From: Lai Jiangshan <laijs@cn.fujitsu.com>
To: Tejun Heo <tj@kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/2] percpu: add percpu_variable_ptr()
Date: Wed, 23 Jun 2010 18:04:35 +0800 [thread overview]
Message-ID: <4C21DC33.6070404@cn.fujitsu.com> (raw)
The percpu variable and allocated percpu data are compatible
witch each other, This patch adds a API, thus we can use
per_cpu_ptr() for defined/declared percpu variable.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index ce2dc65..d5c8d7f 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -81,6 +81,12 @@
#endif
/*
+ * Ptr of the declared/defined per-CPU variable.
+ * It is totally compatible with the return from alloc_percpu().
+ */
+#define percpu_variable_ptr(name) (&(name))
+
+/*
* Variant on the per-CPU variable declaration/definition theme used for
* ordinary per-CPU variables.
*/
next reply other threads:[~2010-06-23 10:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-23 10:04 Lai Jiangshan [this message]
2010-06-23 10:07 ` [PATCH 1/2] percpu: add percpu_variable_ptr() Tejun Heo
2010-06-23 10:20 ` Lai Jiangshan
2010-06-23 10:22 ` Tejun Heo
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