On 07/06/2018 03:55 PM, Janosch Frank wrote:
> skey = (unsigned long) page_get_storage_key(address);
> @@ -839,14 +863,33 @@ EXPORT_SYMBOL(cond_set_guest_storage_key);
> int reset_guest_reference_bit(struct mm_struct *mm, unsigned long addr)
> {
> spinlock_t *ptl;
> + unsigned long address;
> pgste_t old, new;
> + pmd_t *pmdp;
> pte_t *ptep;
> int cc = 0;
>
> - ptep = get_locked_pte(mm, addr, &ptl);
> - if (unlikely(!ptep))
> + pmdp = (pmd_t *)huge_pte_offset(mm, addr, HPAGE_SIZE);
> + if (!pmdp)
> return -EFAULT;
>
> + ptl = pmd_lock(mm, pmdp);
> + if (!pmd_present(*pmdp)) {
> + spin_unlock(ptl);
> + return -EFAULT;
> + }
> + if (pmd_large(*pmdp)) {
> + address = pmd_val(*pmdp) & HPAGE_MASK;
> + address |= addr & ~HPAGE_MASK;
> + cc = page_reset_referenced(addr);
address?
