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 */