[PATCH v5 4/4] powerpc/mm: unstub radix__vmemmap_remove_mapping()

[Reza Arbab]

On Tue, Jan 17, 2017 at 12:55:13PM +0530, Balbir Singh wrote:
>On Mon, Jan 16, 2017 at 01:07:46PM -0600, Reza Arbab wrote:
>> Use remove_pagetable() and friends for radix vmemmap removal.
>>
>> We do not require the special-case handling of vmemmap done in the x86
>> versions of these functions. This is because vmemmap_free() has already
>> freed the mapped pages, and calls us with an aligned address range.
>>
>> So, add a few failsafe WARNs, but otherwise the code to remove physical
>> mappings is already sufficient for vmemmap.
>
>I wonder if we really need them?

Not sure what the guideline is for a "this shouldn't happen" WARN. It 
could save us some grief, should our vmemmap code ever start calling 
with an unaligned range, like it does on x86.

-- 
Reza Arbab