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Subject[tip:perf/core] percpu: Add {get,put}_cpu_ptr
Commit-ID:  8b8e2ec1eeca7f6941bc81cefc9663018d6ceb57
Gitweb: http://git.kernel.org/tip/8b8e2ec1eeca7f6941bc81cefc9663018d6ceb57
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Thu, 16 Sep 2010 19:21:28 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 21 Sep 2010 13:55:43 +0200

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>
---
include/linux/percpu.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
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 */

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