KVM: Drop unnecessary initialization of "npages" in hva_to_pfn_slow()

The variable is initialized but it is only used after its assignment.

Reviewed-by: Sean Christopherson <[email protected]>
Signed-off-by: Li kunyu <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: likunyur

virt/kvm/kvm_main.c

@@ -2518,7 +2518,7 @@ static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault,
 {
 	unsigned int flags = FOLL_HWPOISON;
 	struct page *page;
-	int npages = 0;
+	int npages;
 
 	might_sleep();