From 3e76ee99b095e5bee71165fda5edbe6b66b39700 Mon Sep 17 00:00:00 2001 From: Heiko Carstens 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 Acked-by: Martin Schwidefsky Signed-off-by: Martin Schwidefsky --- 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 f2a5c29a97e9..e67a8f712e19 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++; } -- 2.30.2