[PATCH v2 0/6] mm: memcg: kmem API cleanup

[Roman Gushchin <guro@fb.com>]

This patchset aims to clean up the kernel memory charging API.
It doesn't bring any functional changes, just removes unused
arguments, renames some functions and fixes some comments.

Currently it's not obvious which functions are most basic
(memcg_kmem_(un)charge_memcg()) and which are based on them
(memcg_kmem_(un)charge()). The patchset renames these functions
and removes unused arguments:

TL;DR:
was:
  memcg_kmem_charge_memcg(page, gfp, order, memcg)
  memcg_kmem_uncharge_memcg(memcg, nr_pages)
  memcg_kmem_charge(page, gfp, order)
  memcg_kmem_uncharge(page, order)

now:
  memcg_kmem_charge(memcg, gfp, nr_pages)
  memcg_kmem_uncharge(memcg, nr_pages)
  memcg_kmem_charge_page(page, gfp, order)
  memcg_kmem_uncharge_page(page, order)


v2:
1) Dropped the first patch, which was incorrect. Thanks, Andrew!


Roman Gushchin (6):
  mm: kmem: cleanup (__)memcg_kmem_charge_memcg() arguments
  mm: kmem: cleanup memcg_kmem_uncharge_memcg() arguments
  mm: kmem: rename memcg_kmem_(un)charge() into
    memcg_kmem_(un)charge_page()
  mm: kmem: switch to nr_pages in (__)memcg_kmem_charge_memcg()
  mm: memcg/slab: cache page number in memcg_(un)charge_slab()
  mm: kmem: rename (__)memcg_kmem_(un)charge_memcg() to
    __memcg_kmem_(un)charge()

 fs/pipe.c                  |  2 +-
 include/linux/memcontrol.h | 42 +++++++++++++++--------------
 kernel/fork.c              |  9 ++++---
 mm/memcontrol.c            | 54 ++++++++++++++++++--------------------
 mm/page_alloc.c            |  4 +--
 mm/slab.h                  | 22 +++++++++-------
 6 files changed, 68 insertions(+), 65 deletions(-)

-- 
2.21.1