This patchset converts a number of functions to use folios. This cleans
up some khugepaged code and removes a large number of hidden
compound_head() calls.

---
v3:
  Address filemap_lock_folio() returning ERR_PTR
  Fix uninitialized variable warning
  Some minor rewording

Vishal Moola (Oracle) (5):
  mm/khugepaged: Convert __collapse_huge_page_isolate() to use folios
  mm/khugepaged: Convert hpage_collapse_scan_pmd() to use folios
  mm/khugepaged: Convert is_refcount_suitable() to use folios
  mm/khugepaged: Convert alloc_charge_hpage() to use folios
  mm/khugepaged: Convert collapse_pte_mapped_thp() to use folios

 include/linux/memcontrol.h |  14 ----
 mm/khugepaged.c            | 137 ++++++++++++++++++-------------------
 2 files changed, 68 insertions(+), 83 deletions(-)

-- 
2.40.1