s390/mm: pmdp_get_and_clear_full optimization

Analog to ptep_get_and_clear_full define a variant of the
pmpd_get_and_clear primitive which gets the full hint from the
mmu_gather struct. This allows s390 to avoid a costly instruction
when destroying an address space.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7e9c15cb93a9..6a37f1b2ed1e 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1400,7 +1400,8 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
                  * pgtable_trans_huge_withdraw after finishing pmdp related
                  * operations.
                  */
-                orig_pmd = pmdp_get_and_clear(tlb->mm, addr, pmd);
+                orig_pmd = pmdp_get_and_clear_full(tlb->mm, addr, pmd,
+                                                   tlb->fullmm);
                 tlb_remove_pmd_tlb_entry(tlb, pmd, addr);
                 pgtable = pgtable_trans_huge_withdraw(tlb->mm, pmd);
                 if (is_huge_zero_pmd(orig_pmd)) {