Re: [PATCH V7 2/9] MIPS: c-r4k: Add r4k_blast_scache_node for Loongson-3

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On 06/29/2017 01:46, James Hogan wrote:
> On 29 June 2017 02:33:28 BST, Huacai Chen <chenhc@xxxxxxxxxx> wrote:
>> Hi, James,
>>
>> Is it suitable to add this line in arch/mips/include/asm/mmzone.h?
>> #define pa_to_nid(addr) 0
> 
> It was basically malta_defconfig.
> 
> OTOH when i tried including asm/mmzone.h, that tries including <mmzone.h> which it can't find.
> 
> Cheers
> Jamee
> 

<asm/mmzone.h> is only supposed to be defined for NUMA-aware systems, as far as
I can tell.  I believe a lot of the Loongson code derives somewhat from the
IP27 code, as both are the only MIPS platforms that define a specific version
of that header.

It also looks like the generic mmzone.h header probably just needs the
<mmzone.h> include removed.  pa_to_nid is only used for pfn_to_nid when
CONFIG_DISCONTIGMEM is set, and IP27 is one of the only platforms that uses
that memory model.

--J




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