[PATCH v3.1 4/6] mm/hugetlb: Allow architectures to override huge_pte_clear()

[Punit Agrawal]

Arnd Bergmann <arnd at arndb.de> writes:

> On Mon, May 22, 2017 at 6:25 PM, Punit Agrawal <punit.agrawal at arm.com> wrote:
>> When unmapping a hugepage range, huge_pte_clear() is used to clear the
>> page table entries that are marked as not present. huge_pte_clear()
>> internally just ends up calling pte_clear() which does not correctly
>> deal with hugepages consisting of contiguous page table entries.
>>
>> Add a size argument to address this issue and allow architectures to
>> override huge_pte_clear() by wrapping it in a #ifndef block.
>>
>> Update s390 implementation with the size parameter as well.
>>
>> Note that the change only affects huge_pte_clear() - the other generic
>> hugetlb functions don't need any change.
>>
>> Signed-off-by: Punit Agrawal <punit.agrawal at arm.com>
>> Cc: Martin Schwidefsky <schwidefsky at de.ibm.com>
>> Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
>> Cc: Arnd Bergmann <arnd at arndb.de>
>> Cc: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>
>> Cc: Mike Kravetz <mike.kravetz at oracle.com>
>
> Acked-by: Arnd Bergmann <arnd at arndb.de>

Thanks, Arnd. I've applied the tag locally.

>
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