From 3e76ee99b095e5bee71165fda5edbe6b66b39700 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Thu, 19 May 2016 16:25:30 +0200
Subject: [PATCH] s390/mm: always use PAGE_KERNEL when mapping pages
Always use PAGE_KERNEL when re-enabling pages within the kernel
mapping due to debug pagealloc. Without using this pgprot value
pte_mkwrite() and pte_wrprotect() won't work on such mappings after an
unmap -> map cycle anymore.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/mm/pageattr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index f2a5c29a97e9f..e67a8f712e192 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -138,7 +138,7 @@ void __kernel_map_pages(struct page *page, int numpages, int enable)
nr = min(numpages - i, nr);
if (enable) {
for (j = 0; j < nr; j++) {
- pte_val(*pte) = __pa(address);
+ pte_val(*pte) = address | pgprot_val(PAGE_KERNEL);
address += PAGE_SIZE;
pte++;
}
--
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