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-rw-r--r--arch/s390/mm/gmap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index b6c85b760305..871a99dcf93e 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -759,14 +759,18 @@ static void gmap_call_notifier(struct gmap *gmap, unsigned long start,
static inline unsigned long *gmap_table_walk(struct gmap *gmap,
unsigned long gaddr, int level)
{
+ const int asce_type = gmap->asce & _ASCE_TYPE_MASK;
unsigned long *table;
if ((gmap->asce & _ASCE_TYPE_MASK) + 4 < (level * 4))
return NULL;
if (gmap_is_shadow(gmap) && gmap->removed)
return NULL;
- if (gaddr & (-1UL << (31 + ((gmap->asce & _ASCE_TYPE_MASK) >> 2)*11)))
+
+ if (asce_type != _ASCE_TYPE_REGION1 &&
+ gaddr & (-1UL << (31 + (asce_type >> 2) * 11)))
return NULL;
+
table = gmap->table;
switch (gmap->asce & _ASCE_TYPE_MASK) {
case _ASCE_TYPE_REGION1: