KVM: use __copy_to_user/__clear_user to write guest page

Simply use __copy_to_user/__clear_user to write guest page since we have
already verified the user address when the memslot is set

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 96ebc0679415..087b3f8ca46e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1345,7 +1345,7 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
         addr = gfn_to_hva(kvm, gfn);
         if (kvm_is_error_hva(addr))
                 return -EFAULT;
-        r = copy_to_user((void __user *)addr + offset, data, len);
+        r = __copy_to_user((void __user *)addr + offset, data, len);
         if (r)
                 return -EFAULT;
         mark_page_dirty(kvm, gfn);
@@ -1405,7 +1405,7 @@ int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
         if (kvm_is_error_hva(ghc->hva))
                 return -EFAULT;
 
-        r = copy_to_user((void __user *)ghc->hva, data, len);
+        r = __copy_to_user((void __user *)ghc->hva, data, len);
         if (r)
                 return -EFAULT;
         mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT);