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KVM: guest_memfd: use folio_nr_pages() instead of shift operation 

folio_nr_pages() is a faster helper function to get the number of pages when
NR_PAGES_IN_LARGE_FOLIO is enabled.

Signed-off-by: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
Link: https://lore.kernel.org/r/20251004030210.49080-1-pedrodemargomes@gmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
pull/1354/merge
Pedro Demarchi Gomes 2025-10-04 00:02:10 -03:00 committed by Sean Christopherson
parent 3f1078a445
commit 765fcd7c07
1 changed files with 2 additions and 2 deletions
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4
virt/kvm/guest_memfd.c
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@ -82,9 +82,9 @@ static int kvm_gmem_prepare_folio(struct kvm *kvm, struct kvm_memory_slot *slot,
* The order will be passed when creating the guest_memfd, and * The order will be passed when creating the guest_memfd, and
* checked when creating memslots. * checked when creating memslots.
*/ */
WARN_ON(!IS_ALIGNED(slot->gmem.pgoff, 1 << folio_order(folio))); WARN_ON(!IS_ALIGNED(slot->gmem.pgoff, folio_nr_pages(folio)));
index = kvm_gmem_get_index(slot, gfn); index = kvm_gmem_get_index(slot, gfn);
index = ALIGN_DOWN(index, 1 << folio_order(folio)); index = ALIGN_DOWN(index, folio_nr_pages(folio));
r = __kvm_gmem_prepare_folio(kvm, slot, index, folio); r = __kvm_gmem_prepare_folio(kvm, slot, index, folio);
if (!r) if (!r)
kvm_gmem_mark_prepared(folio); kvm_gmem_mark_prepared(folio);