diff options
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index a4e2936f6d35..3f64c8d9f629 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4024,15 +4024,15 @@ static bool walk_pte_range(pmd_t *pmd, unsigned long start, unsigned long end, struct pglist_data *pgdat = lruvec_pgdat(walk->lruvec); int old_gen, new_gen = lru_gen_from_seq(walk->max_seq); - VM_WARN_ON_ONCE(pmd_leaf(*pmd)); - - ptl = pte_lockptr(args->mm, pmd); - if (!spin_trylock(ptl)) + pte = pte_offset_map_nolock(args->mm, pmd, start & PMD_MASK, &ptl); + if (!pte) return false; + if (!spin_trylock(ptl)) { + pte_unmap(pte); + return false; + } arch_enter_lazy_mmu_mode(); - - pte = pte_offset_map(pmd, start & PMD_MASK); restart: for (i = pte_index(start), addr = start; addr != end; i++, addr += PAGE_SIZE) { unsigned long pfn; @@ -4073,10 +4073,8 @@ restart: if (i < PTRS_PER_PTE && get_next_vma(PMD_MASK, PAGE_SIZE, args, &start, &end)) goto restart; - pte_unmap(pte); - arch_leave_lazy_mmu_mode(); - spin_unlock(ptl); + pte_unmap_unlock(pte, ptl); return suitable_to_scan(total, young); } |