[PATCH v5.5 12/30] KVM: x86: Use "new" memslot instead of userspace memory region

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Get the number of pages directly from the new memslot instead of
computing the same from the userspace memory region when allocating
memslot metadata.  This will allow a future patch to drop @mem.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
 arch/x86/kvm/x86.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index aa2abca47af0..c68e7de9f116 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -11646,9 +11646,9 @@ int memslot_rmap_alloc(struct kvm_memory_slot *slot, unsigned long npages)
 static int kvm_alloc_memslot_metadata(struct kvm *kvm,
-				      struct kvm_memory_slot *slot,
-				      unsigned long npages)
+				      struct kvm_memory_slot *slot)
+	unsigned long npages = slot->npages;
 	int i, r;
@@ -11733,8 +11733,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
 				   enum kvm_mr_change change)
 	if (change == KVM_MR_CREATE || change == KVM_MR_MOVE)
-		return kvm_alloc_memslot_metadata(kvm, new,
-						  mem->memory_size >> PAGE_SHIFT);
+		return kvm_alloc_memslot_metadata(kvm, new);
 	if (change == KVM_MR_FLAGS_ONLY)
 		memcpy(&new->arch, &old->arch, sizeof(old->arch));

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