kernel26-xen/patches-2.6.25-r1/1150-2.6.25-xen-Mark-init-pages-read-write-again-on-free_init_pages.patch

From 82cb9b4c9046ece7ad6a1f6d4cb03f4cbab982b4 Mon Sep 17 00:00:00 2001
From: Eduardo Habkost <ehabkost@redhat.com>
Date: Thu, 3 Apr 2008 19:09:09 -0300
Subject: [PATCH] Mark init pages read-write again on free_init_pages()

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 arch/x86/mm/init_64.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e21c9a4..763914c 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1073,6 +1073,13 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 		begin, PAGE_ALIGN(end));
 	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
 #else
+	/*
+	 * We just marked the kernel text read only above, now that
+	 * we are going to free part of that, we need to make that
+	 * writeable first.
+	 */
+	set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
+
 	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
 
 	for (; addr < end; addr += PAGE_SIZE) {
-- 
1.5.4.1

1	From 82cb9b4c9046ece7ad6a1f6d4cb03f4cbab982b4 Mon Sep 17 00:00:00 2001
2	From: Eduardo Habkost <ehabkost@redhat.com>
3	Date: Thu, 3 Apr 2008 19:09:09 -0300
4	Subject: [PATCH] Mark init pages read-write again on free_init_pages()
5
6	Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
7	---
8	arch/x86/mm/init_64.c \| 7 +++++++
9	1 files changed, 7 insertions(+), 0 deletions(-)
10
11	diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
12	index e21c9a4..763914c 100644
13	--- a/arch/x86/mm/init_64.c
14	+++ b/arch/x86/mm/init_64.c
15	@@ -1073,6 +1073,13 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
16	begin, PAGE_ALIGN(end));
17	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
18	#else
19	+ /*
20	+ * We just marked the kernel text read only above, now that
21	+ * we are going to free part of that, we need to make that
22	+ * writeable first.
23	+ */
24	+ set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
25	+
26	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
27
28	for (; addr < end; addr += PAGE_SIZE) {
29	--
30	1.5.4.1
31