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s390/mm: ignore change bit for vmemmap
author
Heiko Carstens
<heiko.carstens@de.ibm.com>
Sat, 16 Feb 2013 11:42:35 +0000
(12:42 +0100)
committer
Martin Schwidefsky
<schwidefsky@de.ibm.com>
Thu, 28 Feb 2013 08:37:06 +0000
(09:37 +0100)
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>
arch/s390/mm/vmem.c
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diff --git
a/arch/s390/mm/vmem.c
b/arch/s390/mm/vmem.c
index
e21aaf4
..
ffab84d
100644
(file)
--- 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;
}