linux-kernel - [PATCH 0/3] Consolidate system call hugetlb page size encodings

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Date:   Mon, 31 Jul 2017 11:56:23 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org
Cc:     Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...nel.org>, akpm@...ux-foundation.org,
        ak@...ux.intel.com, mtk.manpages@...il.com,
        Davidlohr Bueso <dbueso@...e.de>, khandual@...ux.vnet.ibm.com,
        aneesh.kumar@...ux.vnet.ibm.com, aarcange@...hat.com,
        Arnd Bergmann <arnd@...db.de>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: [PATCH 0/3] Consolidate system call hugetlb page size encodings 

These patches are the result of discussions in this thread [1].  The
following changes are made in the patch set:

1) Put all the log2 encoded huge page size definitions in a common header
   file.  The idea is have a set of definitions that can be use as the
   basis for system call specific definitions such as MAP_HUGE_* and
   SHM_HUGE_*.
2) Remove MAP_HUGE_* definitions in arch specific files.  All these
   definitions are the same.  Consolidate all definitions in the primary
   user header file (uapi/linux/mman.h).
3) Remove SHM_HUGE_* definitions intended for user space from kernel
   header file, and add to user (uapi/linux/shm.h) header file.  Add
   definitions for all known huge page size encodings as in mmap.

[1]https://lkml.org/lkml/2017/3/8/548

Mike Kravetz (3):
  mm:hugetlb: Define system call hugetlb size encodings in single file
  mm: arch: Consolidate mmap hugetlb size encodings
  mm:shm: Use new hugetlb size encoding definitions

 arch/alpha/include/uapi/asm/mman.h        | 11 ----------
 arch/mips/include/uapi/asm/mman.h         | 11 ----------
 arch/parisc/include/uapi/asm/mman.h       | 11 ----------
 arch/powerpc/include/uapi/asm/mman.h      | 16 ---------------
 arch/x86/include/uapi/asm/mman.h          |  3 ---
 arch/xtensa/include/uapi/asm/mman.h       | 11 ----------
 include/linux/shm.h                       | 17 ----------------
 include/uapi/asm-generic/hugetlb_encode.h | 34 +++++++++++++++++++++++++++++++
 include/uapi/asm-generic/mman-common.h    | 11 ----------
 include/uapi/linux/mman.h                 | 22 ++++++++++++++++++++
 include/uapi/linux/shm.h                  | 31 ++++++++++++++++++++++++++--
 11 files changed, 85 insertions(+), 93 deletions(-)
 create mode 100644 include/uapi/asm-generic/hugetlb_encode.h

-- 
2.7.5