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>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index e21aaf4f5cb6..ffab84db6907 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;
                         }