Messages in this thread Patch in this message | | | From | Peter Zijlstra <> | Subject | [PATCH 24/34] mm: sum_cpu_var.patch | Date | Wed, 22 Mar 2006 23:35:43 +0100 |
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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Much used per_cpu op by the additional policies.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
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include/linux/percpu.h | 5 +++++ 1 file changed, 5 insertions(+)
Index: linux-2.6/include/linux/percpu.h =================================================================== --- linux-2.6.orig/include/linux/percpu.h 2006-03-13 20:38:20.000000000 +0100 +++ linux-2.6/include/linux/percpu.h 2006-03-13 20:45:24.000000000 +0100 @@ -15,6 +15,11 @@ #define get_cpu_var(var) (*({ preempt_disable(); &__get_cpu_var(var); })) #define put_cpu_var(var) preempt_enable() +#define __sum_cpu_var(type, var) ({ __typeof__(type) sum = 0; \ + int cpu; \ + for_each_cpu(cpu) sum += per_cpu(var, cpu); \ + sum; }) + #ifdef CONFIG_SMP struct percpu_data { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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