Re: [RFC 2/3] mm: export zap_page_range()

[Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>]

hi,

> On 18.03.22 10:55, Xiaoguang Wang wrote:
>> Module target_core_user will use it to implement zero copy feature.
>>
>> Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
>> ---
>>   mm/memory.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/mm/memory.c b/mm/memory.c
>> index 1f745e4d11c2..9974d0406dad 100644
>> --- a/mm/memory.c
>> +++ b/mm/memory.c
>> @@ -1664,6 +1664,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
>>   	mmu_notifier_invalidate_range_end(&range);
>>   	tlb_finish_mmu(&tlb);
>>   }
>> +EXPORT_SYMBOL_GPL(zap_page_range);
>>   
>>   /**
>>    * zap_page_range_single - remove user pages in a given range
> To which VMAs will you be applying zap_page_range? I assume only to some
> special ones where you previously vm_insert_page(s)_mkspecial'ed pages,
> not to some otherwise random VMAs, correct?
Yes, you're right :)

Regards,
Xiaoguang Wang
>