---

yaml --- r: 173043 b: refs/heads/master c: e7d23dd h: refs/heads/master i: 173041: 0954575 173039: 2570f09 v: v3
git-mirror · Nov 2, 2009 · c9ab2fb · c9ab2fb
1 parent f3cb1fc
commit c9ab2fb
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Showing 2 changed files with 11 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 55ca3cc1746335bb6ef1d3894ddb6d0c729b3518
+refs/heads/master: e7d23dde9b7ebb575e2bcee2abefc9ec1e4adde9
diff --git a/trunk/arch/x86/mm/init_64.c b/trunk/arch/x86/mm/init_64.c
@@ -700,28 +700,36 @@ int kernel_set_to_readonly;
 void set_kernel_text_rw(void)
 {
 	unsigned long start = PFN_ALIGN(_text);
-	unsigned long end = PFN_ALIGN(__start_rodata);
+	unsigned long end = PFN_ALIGN(__stop___ex_table);
 
 	if (!kernel_set_to_readonly)
 		return;
 
 	pr_debug("Set kernel text: %lx - %lx for read write\n",
 		 start, end);
 
+	/*
+	 * Make the kernel identity mapping for text RW. Kernel text
+	 * mapping will always be RO. Refer to the comment in
+	 * static_protections() in pageattr.c
+	 */
 	set_memory_rw(start, (end - start) >> PAGE_SHIFT);
 }
 
 void set_kernel_text_ro(void)
 {
 	unsigned long start = PFN_ALIGN(_text);
-	unsigned long end = PFN_ALIGN(__start_rodata);
+	unsigned long end = PFN_ALIGN(__stop___ex_table);
 
 	if (!kernel_set_to_readonly)
 		return;
 
 	pr_debug("Set kernel text: %lx - %lx for read only\n",
 		 start, end);
 
+	/*
+	 * Set the kernel identity mapping for text RO.
+	 */
 	set_memory_ro(start, (end - start) >> PAGE_SHIFT);
 }