Re: [PATCH v12 09/11] mm: Allow arch code to override copy_highpage()

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On 03/05/2018 12:42 PM, Khalid Aziz wrote:
> On 03/05/2018 12:24 PM, Dave Hansen wrote:
>> On 02/21/2018 09:15 AM, Khalid Aziz wrote:
>>> +#ifndef __HAVE_ARCH_COPY_HIGHPAGE
>>> +
>>>   static inline void copy_highpage(struct page *to, struct page *from)
>>>   {
>>>       char *vfrom, *vto;
>>> @@ -248,4 +250,6 @@ static inline void copy_highpage(struct page *to,
>>> struct page *from)
>>>       kunmap_atomic(vfrom);
>>>   }
>>>   +#endif
>>
>> I think we prefer that these are CONFIG_* options.
> 
> I added this mechanism to be same as what we have for copy_user_highpage():
> 
> ---------------
> #ifndef __HAVE_ARCH_COPY_USER_HIGHPAGE

I think that's the old way that we generally don't want to add new
instances of.

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