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| author |   Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2018-08-07 18:57:11 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-08-09 08:05:48 +0200 |
| commit | 37a366face294facb9c9d9fdd9f5b64a27456cbd (patch) | |
| tree | 1632e0bf35b441b454f9d0ebda84c1e99ecbe454 /arch/s390/mm | |
| parent | rseq/selftests: add s390 support (diff) | |
| download | linux-dev-37a366face294facb9c9d9fdd9f5b64a27456cbd.tar.xz linux-dev-37a366face294facb9c9d9fdd9f5b64a27456cbd.zip | |
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 <heiko.carstens@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/page-states.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); } |