1 files changed, 9 insertions, 0 deletions
diff --git a/virt/kvm/kvm_mm.h b/virt/kvm/kvm_mm.h
index d5a215958f06..d3ac1ba8ba66 100644
--- a/virt/kvm/kvm_mm.h
+++ b/virt/kvm/kvm_mm.h
@@ -35,6 +35,15 @@ struct kvm_follow_pfn {
 	 * Set to true if a writable mapping was obtained.
 	 */
 	bool *map_writable;
+
+	/*
+	 * Optional output.  Set to a valid "struct page" if the returned pfn
+	 * is for a refcounted or pinned struct page, NULL if the returned pfn
+	 * has no struct page or if the struct page is not being refcounted
+	 * (e.g. tail pages of non-compound higher order allocations from
+	 * IO/PFNMAP mappings).
+	 */
+	struct page **refcounted_page;
 };
 
 kvm_pfn_t hva_to_pfn(struct kvm_follow_pfn *kfp);