On Sat, 3 Nov 2012, Shan Wei wrote:
> +++ b/net/core/flow.c
> @@ -327,11 +327,9 @@ static void flow_cache_flush_tasklet(unsigned long data)
> static void flow_cache_flush_per_cpu(void *data)
> {
> struct flow_flush_info *info = data;
> - int cpu;
> struct tasklet_struct *tasklet;
>
> - cpu = smp_processor_id();
> - tasklet = &per_cpu_ptr(info->cache->percpu, cpu)->flush_tasklet;
> + tasklet = &this_cpu_ptr(info->cache->percpu)->flush_tasklet
Another case for the use of this_cpu_read
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