> diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
> index d4d409b..b22c2b6 100644
> --- a/arch/s390/mm/pgtable.c
> +++ b/arch/s390/mm/pgtable.c
> @@ -196,7 +196,7 @@ static inline pgste_t ptep_xchg_start(struct mm_struct *mm,
> {
> pgste_t pgste = __pgste(0);
>
> - if (mm_has_pgste(mm)) {
> + if (pgtable_has_pgste(mm, __pa(ptep))) {
> pgste = pgste_get_lock(ptep);
> pgste = pgste_pte_notify(mm, addr, ptep, pgste);
> }
> @@ -207,7 +207,7 @@ static inline pte_t ptep_xchg_commit(struct mm_struct *mm,
> unsigned long addr, pte_t *ptep,
> pgste_t pgste, pte_t old, pte_t new)
> {
> - if (mm_has_pgste(mm)) {
> + if (pgtable_has_pgste(mm, __pa(ptep))) {
> if (pte_val(old) & _PAGE_INVALID)
> pgste_set_key(ptep, pgste, new, mm);
> if (pte_val(new) & _PAGE_INVALID)
I think these two checks are wrong. We really have to test here the
mapcount bit only (relying on mm_has_pgste(mm) is wrong in case global
vm.allocate_pgste ist set).
But before I continue working on this, I think it makes sense to clarify
if something like that would be acceptable at all.
--
Thanks,
David
