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percpu: Add {get,put}_cpu_ptr

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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>
This commit is contained in:
Peter Zijlstra 2010-09-16 19:21:28 +02:00 committed by Ingo Molnar
parent 7ed569206e
commit 8b8e2ec1ee
1 changed files with 9 additions and 0 deletions
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9
include/linux/percpu.h
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@ -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 */