From 37a366face294facb9c9d9fdd9f5b64a27456cbd Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Tue, 7 Aug 2018 18:57:11 +0200 Subject: [PATCH] s390/mm: fix addressing exception after suspend/resume Commit c9b5ad546e7d "s390/mm: tag normal pages vs pages used in page tables" accidentally changed the logic in arch_set_page_states(), which is used by the suspend/resume code. set_page_stable(page, order) was changed to set_page_stable_dat(page, 0). After this, only the first page of higher order pages will be set to stable, and a write to one of the unstable pages will result in an addressing exception. Fix this by using "order" again, instead of "0". Fixes: c9b5ad546e7d ("s390/mm: tag normal pages vs pages used in page tables") Cc: stable@vger.kernel.org # 4.14+ Reviewed-by: Heiko Carstens Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- arch/s390/mm/page-states.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c index 382153ff17e3..dc3cede7f2ec 100644 --- a/arch/s390/mm/page-states.c +++ b/arch/s390/mm/page-states.c @@ -271,7 +271,7 @@ void arch_set_page_states(int make_stable) list_for_each(l, &zone->free_area[order].free_list[t]) { page = list_entry(l, struct page, lru); if (make_stable) - set_page_stable_dat(page, 0); + set_page_stable_dat(page, order); else set_page_unused(page, order); } -- 2.30.2