possible readability improvement for i386 pcpu macros:

[Julian Elischer]

John Baldwin wrote:
> On Sunday 02 August 2009 6:23:26 am Julian Elischer wrote:
>> if you have to ever look at the output of the cpp then this removes a 
>> number of things you have to puzzle over in the output of PCPU_SET()
>> and friends.
>>
>>
>> I don't know if it applies to the other architectures.
> 
> It probably applies to amd64.  Also, simplifying the amount of code the macros 
> generate can reduce compile time.  That is why Peter added __curthread() so 
> that all the curthread references did not have to compile a fully expanded 
> PCPU_GET() macro each time.  It gave a noticable reduction in kernel compile 
> time.
> 

turns out it is already in amd64..