sbinfo = SHMEM_SB(inode->i_sb);
charge_mm = vma ? vma->vm_mm : NULL;
- folio = __filemap_get_folio(mapping, index, FGP_ENTRY | FGP_LOCK, 0);
+ folio = filemap_get_entry(mapping, index);
if (folio && vma && userfaultfd_minor(vma)) {
- if (!xa_is_value(folio)) {
- folio_unlock(folio);
+ if (!xa_is_value(folio))
folio_put(folio);
- }
*fault_type = handle_userfault(vmf, VM_UFFD_MINOR);
return 0;
}
}
if (folio) {
+ folio_lock(folio);
+
+ /* Has the folio been truncated or swapped out? */
+ if (unlikely(folio->mapping != mapping)) {
+ folio_unlock(folio);
+ folio_put(folio);
+ goto repeat;
+ }
if (sgp == SGP_WRITE)
folio_mark_accessed(folio);
if (folio_test_uptodate(folio))