From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Sat, 16 Feb 2013 11:42:35 +0000 (+0100)
Subject: s390/mm: ignore change bit for vmemmap
X-Git-Tag: v3.9-rc1~5^2~10
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=17ea345a474925ad0da2ad5a8791cd5443301667;p=thirdparty%2Fkernel%2Flinux.git

s390/mm: ignore change bit for vmemmap

Add hint to the page tables that we don't care about the change bit
in storage keys that belong to vmemmap pages.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index e21aaf4f5cb6a..ffab84db69071 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -236,7 +236,8 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
 				if (!new_page)
 					goto out;
 				pmd_val(*pm_dir) = __pa(new_page) |
-					_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE;
+					_SEGMENT_ENTRY | _SEGMENT_ENTRY_LARGE |
+					_SEGMENT_ENTRY_CO;
 				address = (address + PMD_SIZE) & PMD_MASK;
 				continue;
 			}