[lvc-project] [PATCH] mm/memory_hotplug: prevent accessing by index=-1

[David Hildenbrand]

On 03.06.24 19:53, Oscar Salvador wrote:
> On Mon, Jun 03, 2024 at 06:07:39PM +0200, David Hildenbrand wrote:
>> pgdat is never dereferenced when "nid == NUMA_NO_NODE".
> 
> Right.
> 
>> NODE_DATA is defined as
>>
>> arch/arm64/include/asm/mmzone.h:#define NODE_DATA(nid)          (node_data[(nid)])
>> arch/loongarch/include/asm/mmzone.h:#define NODE_DATA(nid)      (node_data[(nid)])
>> arch/mips/include/asm/mach-ip27/mmzone.h:#define NODE_DATA(n)           (&__node_data[(n)]->pglist)
> 
> All look fine, but mips.

$ git grep MEMORY_HOTPLUG | grep mips | wc -l
0

I think it owuld be problematic, if mips would support memory hotplug.

Or am I missing something?

-- 
Cheers,

David / dhildenb