[0/6] page->index removals in mm

Message

Matthew Wilcox July 23, 2024, 3:34 p.m. UTC

As part of shrinking struct page, we need to stop using page->index.
This patchset gets rid of most of the remaining references to page->index
in mm, as well as increasing the number of functions which take a
const folio/page pointer.  It shrinks the text segment of mm by a few
hundred bytes in my test config, probably mostly from removing calls to
compound_head() in page_to_pgoff().

Matthew Wilcox (Oracle) (6):
  bootmem: Stop using page->index
  mm: Constify page_address_in_vma()
  mm: Convert page_to_pgoff() to page_pgoff()
  mm: Mass constification of folio/page pointers
  mm: Remove references to page->index in huge_memory.c
  mm: Use page->private instead of page->index in percpu

 arch/x86/mm/init_64.c        |  9 ++++-----
 include/linux/bootmem_info.h | 25 +++++++++++++++++--------
 include/linux/ksm.h          |  7 ++++---
 include/linux/pagemap.h      | 18 ------------------
 include/linux/rmap.h         | 12 ++++++------
 mm/bootmem_info.c            | 11 ++++++-----
 mm/huge_memory.c             | 18 +++++++++---------
 mm/internal.h                | 13 ++++++++++---
 mm/ksm.c                     |  5 +++--
 mm/memory-failure.c          | 28 +++++++++++++++-------------
 mm/page_vma_mapped.c         |  5 +++--
 mm/percpu.c                  |  4 ++--
 mm/rmap.c                    | 18 ++++++++++--------
 mm/sparse.c                  |  8 ++++----
 mm/util.c                    |  2 +-
 15 files changed, 94 insertions(+), 89 deletions(-)