s390/mm: optimize reset_guest_reference_bit()

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We already optimize get_guest_storage_key() to assume that if we don't have
a PTE table and don't have a huge page mapped that the storage key is 0.

Similarly, optimize reset_guest_reference_bit() to simply do nothing if
there is no PTE table and no huge page mapped.

Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/20210909162248.14969-10-david@redhat.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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David Hildenbrand 2021-09-09 18:22:48 +02:00 • committed by Christian Borntraeger

parent 7cb70266b0

commit 14ea40e22c

1 changed files with 12 additions and 2 deletions

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arch/s390/mm/pgtable.c

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