---

yaml --- r: 85769 b: refs/heads/master c: f34b439 h: refs/heads/master i: 85767: 202e156 v: v3
git-mirror · Feb 18, 2008 · ce6fea7 · ce6fea7
1 parent e2139dd
commit ce6fea7
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Showing 2 changed files with 20 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: af96e4438a4b34a257f5318a296e0b9e182e7ab9
+refs/heads/master: f34b439f34c49d7de858234bab5e2dd03cfaf3c1
diff --git a/trunk/arch/x86/mm/pageattr.c b/trunk/arch/x86/mm/pageattr.c
@@ -594,19 +594,34 @@ static int __change_page_attr_set_clr(struct cpa_data *cpa, int checkalias);
 static int cpa_process_alias(struct cpa_data *cpa)
 {
 	struct cpa_data alias_cpa;
-	int ret;
+	int ret = 0;
 
 	if (cpa->pfn > max_pfn_mapped)
 		return 0;
 
-	alias_cpa = *cpa;
-	alias_cpa.vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
+	/*
+	 * No need to redo, when the primary call touched the direct
+	 * mapping already:
+	 */
+	if (!within(cpa->vaddr, PAGE_OFFSET,
+		    PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))) {
 
-	ret = __change_page_attr_set_clr(&alias_cpa, 0);
+		alias_cpa = *cpa;
+		alias_cpa.vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
+
+		ret = __change_page_attr_set_clr(&alias_cpa, 0);
+	}
 
 #ifdef CONFIG_X86_64
 	if (ret)
 		return ret;
+	/*
+	 * No need to redo, when the primary call touched the high
+	 * mapping already:
+	 */
+	if (within(cpa->vaddr, (unsigned long) _text, (unsigned long) _end))
+		return 0;
+
 	/*
 	 * If the physical address is inside the kernel map, we need
 	 * to touch the high mapped kernel as well: