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Diffstat (limited to 'arch/s390/mm/gmap.c')
-rw-r--r--arch/s390/mm/gmap.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 1a95d8809cc3..4b6903fbba4a 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -788,19 +788,19 @@ 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;
+ unsigned long *table = gmap->table;
- if ((gmap->asce & _ASCE_TYPE_MASK) + 4 < (level * 4))
- return NULL;
if (gmap_is_shadow(gmap) && gmap->removed)
return NULL;
+ if (WARN_ON_ONCE(level > (asce_type >> 2) + 1))
+ return NULL;
+
if (asce_type != _ASCE_TYPE_REGION1 &&
gaddr & (-1UL << (31 + (asce_type >> 2) * 11)))
return NULL;
- table = gmap->table;
- switch (gmap->asce & _ASCE_TYPE_MASK) {
+ switch (asce_type) {
case _ASCE_TYPE_REGION1:
table += (gaddr & _REGION1_INDEX) >> _REGION1_SHIFT;
if (level == 4)