Re: [PATCH 3/4] mmu_notifier: remove the .change_pte() callback

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On 05.04.24 13:58, Paolo Bonzini wrote:
The scope of set_pte_at_notify() has reduced more and more through the
years.  Initially, it was meant for when the change to the PTE was
not bracketed by mmu_notifier_invalidate_range_{start,end}().  However,
that has not been so for over ten years.  During all this period
the only implementation of .change_pte() was KVM and it
had no actual functionality, because it was called after
mmu_notifier_invalidate_range_start() zapped the secondary PTE.

Now that this (nonfunctional) user of the .change_pte() callback is
gone, the whole callback can be removed.  For now, leave in place
set_pte_at_notify() even though it is just a synonym for set_pte_at().

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>


David / dhildenb

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