From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 16 Sep 2010 17:21:28 +0000 (+0200)
Subject: percpu: Add {get,put}_cpu_ptr
X-Git-Tag: upstream/snapshot3+hdmi~12756^2~37
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b8e2ec1eeca7f6941bc81cefc9663018d6ceb57;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

percpu: Add {get,put}_cpu_ptr

These are similar to {get,put}_cpu_var() except for dynamically
allocated per-cpu memory.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <20100917093009.252867712@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 49466b1..0eb5083 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -39,6 +39,15 @@
 	preempt_enable();				\
 } while (0)
 
+#define get_cpu_ptr(var) ({				\
+	preempt_disable();				\
+	this_cpu_ptr(var); })
+
+#define put_cpu_ptr(var) do {				\
+	(void)(var);					\
+	preempt_enable();				\
+} while (0)
+
 #ifdef CONFIG_SMP
 
 /* minimum unit size, also is the maximum supported allocation size */