[v2,0/6] Fix some bugs related to ramp and dax

Message

Muchun Song Feb. 2, 2022, 2:33 p.m. UTC

Patch 1-2 fix a cache flush bug, because subsequent patches depend on
those on those changes, there are placed in this series.  Patch 3-4
are preparation for fixing a dax bug in patch 5.  Patch 6 is code cleanup
since the previous patch remove the usage of follow_invalidate_pte().

Changes in v2:
  - Avoid the overly long line in lots of places suggested by Christoph.
  - Fix a compiler warning reported by kernel test robot since pmd_pfn()
    is not defined when !CONFIG_TRANSPARENT_HUGEPAGE on powerpc architecture.
  - Split a new patch 4 for preparation of fixing the dax bug.

Muchun Song (6):
  mm: rmap: fix cache flush on THP pages
  dax: fix cache flush on PMD-mapped pages
  mm: page_vma_mapped: support checking if a pfn is mapped into a vma
  mm: rmap: introduce pfn_mkclean_range() to cleans PTEs
  dax: fix missing writeprotect the pte entry
  mm: remove range parameter from follow_invalidate_pte()

 fs/dax.c                | 82 ++++------------------------------------------
 include/linux/mm.h      |  3 --
 include/linux/rmap.h    | 17 ++++++++--
 include/linux/swapops.h | 13 +++++---
 mm/internal.h           | 52 +++++++++++++++++++----------
 mm/memory.c             | 23 ++-----------
 mm/page_vma_mapped.c    | 68 ++++++++++++++++++++++++--------------
 mm/rmap.c               | 87 ++++++++++++++++++++++++++++++++++++++-----------
 8 files changed, 180 insertions(+), 165 deletions(-)