[PATCH v2 00/15] Remove 'order' argument from many mm functions

[Matthew Wilcox <willy@infradead.org>]

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

This is a little more serious attempt than v1, since nobody seems opposed
to the concept of using GFP flags to pass the order around.  I've split
it up a bit better, and I've reversed the arguments of __alloc_pages_node
to match the order of the arguments to other functions in the same family.
alloc_pages_node() needs the same treatment, but there's about 70 callers,
so I'm going to skip it for now.

This is against current -mm.  I'm seeing a text saving of 482 bytes from
a tinyconfig vmlinux (1003785 reduced to 1003303).  There are more
savings to be had by combining together order and the gfp flags, for
example in the scan_control data structure.

I think there are also cognitive savings to be had from eliminating
some of the function variants which exist solely to take an 'order'.

Matthew Wilcox (Oracle) (15):
  mm: Remove gfp_flags argument from rmqueue_pcplist
  mm: Pass order to __alloc_pages_nodemask in GFP flags
  mm: Pass order to __alloc_pages in GFP flags
  mm: Pass order to alloc_page_interleave in GFP flags
  mm: Pass order to alloc_pages_current in GFP flags
  mm: Pass order to alloc_pages_vma in GFP flags
  mm: Pass order to __alloc_pages_node in GFP flags
  mm: Pass order to __get_free_page in GFP flags
  mm: Pass order to prep_new_page in GFP flags
  mm: Pass order to rmqueue in GFP flags
  mm: Pass order to get_page_from_freelist in GFP flags
  mm: Pass order to __alloc_pages_cpuset_fallback in GFP flags
  mm: Pass order to prepare_alloc_pages in GFP flags
  mm: Pass order to try_to_free_pages in GFP flags
  mm: Pass order to node_reclaim() in GFP flags

 arch/ia64/kernel/uncached.c       |  6 +-
 arch/ia64/sn/pci/pci_dma.c        |  4 +-
 arch/powerpc/platforms/cell/ras.c |  5 +-
 arch/x86/events/intel/ds.c        |  4 +-
 arch/x86/kvm/vmx/vmx.c            |  4 +-
 drivers/misc/sgi-xp/xpc_uv.c      |  5 +-
 include/linux/gfp.h               | 59 +++++++++++--------
 include/linux/migrate.h           |  2 +-
 include/linux/swap.h              |  2 +-
 include/trace/events/vmscan.h     | 28 ++++-----
 kernel/profile.c                  |  2 +-
 mm/filemap.c                      |  2 +-
 mm/gup.c                          |  4 +-
 mm/hugetlb.c                      |  5 +-
 mm/internal.h                     |  5 +-
 mm/khugepaged.c                   |  2 +-
 mm/mempolicy.c                    | 34 +++++------
 mm/migrate.c                      |  9 ++-
 mm/page_alloc.c                   | 98 +++++++++++++++----------------
 mm/shmem.c                        |  5 +-
 mm/slab.c                         |  3 +-
 mm/slob.c                         |  2 +-
 mm/slub.c                         |  2 +-
 mm/vmscan.c                       | 26 ++++----
 24 files changed, 157 insertions(+), 161 deletions(-)

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2.20.1