Re: [patch] add optimized generic percpu accessors

[Tejun Heo]

roel kluin wrote:
>> Index: linux/include/asm-generic/percpu.h
>> ===================================================================
>> --- linux.orig/include/asm-generic/percpu.h
>> +++ linux/include/asm-generic/percpu.h
>> @@ -80,4 +80,32 @@ extern void setup_per_cpu_areas(void);
>>  #define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \
>>                                        __typeof__(type) per_cpu_var(name)
>>
>> +/*
>> + * Optional methods for optimized non-lvalue per-cpu variable access:
>> + */
>> +
>> +#ifndef percpu_read
>> +# define percpu_read(var)              __get_cpu_var(var)
>> +#endif
>> +
>> +#ifndef percpu_write
>> +# define percpu_write(var, val)                ({ __get_cpu_var(var) = (val); })
>> +#endif
>> +
>> +#ifndef percpu_add
>> +# define percpu_add(var, val)          ({ __get_cpu_var(var) += (val); })
>> +#endif
>> +
>> +#ifndef percpu_sub
>> +# define percpu_add(var, val)          ({ __get_cpu_var(var) += (val); })
> 
> this should be:
> 
> define percpu_sub(var, val)          ({ __get_cpu_var(var) -= (val); })

Thanks.  Will fold into the patch.

-- 
tejun
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