[PATCH 01/19] ARM: sort the meminfo array earlier

[sboyd@codeaurora.org (Stephen Boyd)]

On 09/16/11 11:09, Nicolas Pitre wrote:
> On Fri, 16 Sep 2011, Stephen Boyd wrote:
>
>
>> This looks like:
>>
>>     return clamp(bank_pfn_start(a) - bank_pfn_start(b), -1, 1);
> Won't work.  The pfn is of an unsigned type, hence the subtraction 
> result will also be unsigned.  The code above looks a bit odd, but there 
> is an implicit cast to a signed result with the result stored into a 
> long.
>
> What would have been even clearer, and possibly more efficient as well, 
> is something like this:
>
> 	if (bank_pfn_start(a) < bank_pfn_start(b))
> 		return -1;
> 	if (bank_pfn_start(a) > bank_pfn_start(b))
> 		return 1;
> 	return 0;

Ok so

    return clamp_t(long, bank_pfn_start(a) - bank_pfn_start(b), -1, 1); 


?

>
> But the goal here was to simply move the code, changing it would warrant 
> a separate patch.

Fair enough.

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