X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fmm%2Fpageattr.c;h=464d8fc21ce69b67d8d8bf057f5a57ef6a84c677;hb=8a235efad548abd2ab5ebea45a9ffa750c814375;hp=e2a74ea11a5309ec4e8181f26bb8b62271ec0d15;hpb=e80af3a8dbbbf431b2070cc760699f01c5a6ac69;p=linux-2.6-omap-h63xx.git

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index e2a74ea11a5..464d8fc21ce 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -899,7 +899,24 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 	 */
 	cpa_fill_pool();
 }
-#endif
+
+#ifdef CONFIG_HIBERNATION
+
+bool kernel_page_present(struct page *page)
+{
+	unsigned int level;
+	pte_t *pte;
+
+	if (PageHighMem(page))
+		return false;
+
+	pte = lookup_address((unsigned long)page_address(page), &level);
+	return (pte_val(*pte) & _PAGE_PRESENT);
+}
+
+#endif /* CONFIG_HIBERNATION */
+
+#endif /* CONFIG_DEBUG_PAGEALLOC */
 
 /*
  * The testcases use internal knowledge of the implementation that shouldn't