diff options
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 13 |
1 files changed, 9 insertions, 4 deletions
@@ -565,7 +565,7 @@ static void *dax_insert_mapping_entry(struct address_space *mapping, ret = __radix_tree_lookup(page_tree, index, &node, &slot); WARN_ON_ONCE(ret != entry); __radix_tree_replace(page_tree, node, slot, - new_entry, NULL, NULL); + new_entry, NULL); entry = new_entry; } @@ -614,6 +614,13 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, if (follow_pte_pmd(vma->vm_mm, address, &start, &end, &ptep, &pmdp, &ptl)) continue; + /* + * No need to call mmu_notifier_invalidate_range() as we are + * downgrading page table protection not changing it to point + * to a new page. + * + * See Documentation/vm/mmu_notifier.txt + */ if (pmdp) { #ifdef CONFIG_FS_DAX_PMD pmd_t pmd; @@ -628,7 +635,6 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, pmd = pmd_wrprotect(pmd); pmd = pmd_mkclean(pmd); set_pmd_at(vma->vm_mm, address, pmdp, pmd); - mmu_notifier_invalidate_range(vma->vm_mm, start, end); unlock_pmd: spin_unlock(ptl); #endif @@ -643,7 +649,6 @@ unlock_pmd: pte = pte_wrprotect(pte); pte = pte_mkclean(pte); set_pte_at(vma->vm_mm, address, ptep, pte); - mmu_notifier_invalidate_range(vma->vm_mm, start, end); unlock_pte: pte_unmap_unlock(ptep, ptl); } @@ -789,7 +794,7 @@ int dax_writeback_mapping_range(struct address_space *mapping, tag_pages_for_writeback(mapping, start_index, end_index); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (!done) { pvec.nr = find_get_entries_tag(mapping, start_index, PAGECACHE_TAG_TOWRITE, PAGEVEC_SIZE, |