3.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Commit 52f36be0f4e2 's390/pgtable: Fix check for pgste/storage key
handling', which was commit b56433cb782d upstream, added a use of
pgste to ptep_modify_prot_start(), but this variable does not exist.
In mainline, pgste was added by commit d3383632d4e8 's390/mm: add pte
invalidation notifier for kvm' and initialised to the return value of
pgste_get_lock(ptep). Initialise it similarly here.
Compile-tested only.
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/include/asm/pgtable.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1063,11 +1063,12 @@ static inline pte_t ptep_modify_prot_sta
unsigned long address,
pte_t *ptep)
{
+ pgste_t pgste;
pte_t pte;
mm->context.flush_mm = 1;
if (mm_has_pgste(mm))
- pgste_get_lock(ptep);
+ pgste = pgste_get_lock(ptep);
pte = *ptep;
if (!mm_exclusive(mm))
--
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