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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>
hifive-unleashed-5.1
Heiko Carstens 2016-05-19 16:25:30 +02:00 committed by Martin Schwidefsky
parent 5aa29975e8
commit 3e76ee99b0
1 changed files with 1 additions and 1 deletions
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2
arch/s390/mm/pageattr.c
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@ -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++;
}