xen: add page_to_mfn()

pfn_to_mfn(page_to_pfn(p)) is a common use case so add a generic helper for it. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
mariux64 · Jan 14, 2015 · 28e98c2 · 28e98c2
1 parent 933685c
commit 28e98c2
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/include/xen/page.h b/include/xen/page.h
@@ -3,6 +3,11 @@
 
 #include <asm/xen/page.h>
 
+static inline unsigned long page_to_mfn(struct page *page)
+{
+	return pfn_to_mfn(page_to_pfn(page));
+}
+
 struct xen_memory_region {
 	phys_addr_t start;
 	phys_addr_t size;