linux-kernel - [PATCHv3 0/8] powerpc/mm: refactor vDSO mapping code

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Date:   Thu, 27 Oct 2016 20:09:40 +0300
From:   Dmitry Safonov <dsafonov@...tuozzo.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Dmitry Safonov <dsafonov@...tuozzo.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "Michael Ellerman" <mpe@...erman.id.au>,
        Andy Lutomirski <luto@...capital.net>,
        "Oleg Nesterov" <oleg@...hat.com>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-mm@...ck.org>, Laurent Dufour <ldufour@...ux.vnet.ibm.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCHv3 0/8] powerpc/mm: refactor vDSO mapping code

Changes since v1, v2:
- use vdso64_pages only under CONFIG_PPC64 (32-bit build fix)
- remove arch_vma_name helper as not needed anymore,
  simplify vdso_base pointer initializing in map_vdso()

Cleanup patches for vDSO on powerpc.
Originally, I wanted to add vDSO remapping on arm/aarch64 and
I decided to cleanup that part on powerpc.
I've add a hook for vm_ops for vDSO just like I did for x86,
which makes cross-arch arch_mremap hook no more needed.
Other changes - reduce exhaustive code duplication by
separating the common vdso code.

No visible to userspace changes expected.
Tested on qemu with buildroot rootfs.

Dmitry Safonov (8):
  powerpc/vdso: unify return paths in setup_additional_pages
  powerpc/vdso: remove unused params in vdso_do_func_patch{32,64}
  powerpc/vdso: separate common code in vdso_common
  powerpc/vdso: introduce init_vdso{32,64}_pagelist
  powerpc/vdso: split map_vdso from arch_setup_additional_pages
  powerpc/vdso: switch from legacy_special_mapping_vmops
  mm: kill arch_mremap
  powerpc/vdso: remove arch_vma_name

 arch/alpha/include/asm/Kbuild            |   1 -
 arch/arc/include/asm/Kbuild              |   1 -
 arch/arm/include/asm/Kbuild              |   1 -
 arch/arm64/include/asm/Kbuild            |   1 -
 arch/avr32/include/asm/Kbuild            |   1 -
 arch/blackfin/include/asm/Kbuild         |   1 -
 arch/c6x/include/asm/Kbuild              |   1 -
 arch/cris/include/asm/Kbuild             |   1 -
 arch/frv/include/asm/Kbuild              |   1 -
 arch/h8300/include/asm/Kbuild            |   1 -
 arch/hexagon/include/asm/Kbuild          |   1 -
 arch/ia64/include/asm/Kbuild             |   1 -
 arch/m32r/include/asm/Kbuild             |   1 -
 arch/m68k/include/asm/Kbuild             |   1 -
 arch/metag/include/asm/Kbuild            |   1 -
 arch/microblaze/include/asm/Kbuild       |   1 -
 arch/mips/include/asm/Kbuild             |   1 -
 arch/mn10300/include/asm/Kbuild          |   1 -
 arch/nios2/include/asm/Kbuild            |   1 -
 arch/openrisc/include/asm/Kbuild         |   1 -
 arch/parisc/include/asm/Kbuild           |   1 -
 arch/powerpc/include/asm/mm-arch-hooks.h |  28 --
 arch/powerpc/kernel/vdso.c               | 502 +++++--------------------------
 arch/powerpc/kernel/vdso_common.c        | 248 +++++++++++++++
 arch/s390/include/asm/Kbuild             |   1 -
 arch/score/include/asm/Kbuild            |   1 -
 arch/sh/include/asm/Kbuild               |   1 -
 arch/sparc/include/asm/Kbuild            |   1 -
 arch/tile/include/asm/Kbuild             |   1 -
 arch/um/include/asm/Kbuild               |   1 -
 arch/unicore32/include/asm/Kbuild        |   1 -
 arch/x86/include/asm/Kbuild              |   1 -
 arch/xtensa/include/asm/Kbuild           |   1 -
 include/asm-generic/mm-arch-hooks.h      |  16 -
 include/linux/mm-arch-hooks.h            |  25 --
 mm/mremap.c                              |   4 -
 36 files changed, 324 insertions(+), 529 deletions(-)
 delete mode 100644 arch/powerpc/include/asm/mm-arch-hooks.h
 create mode 100644 arch/powerpc/kernel/vdso_common.c
 delete mode 100644 include/asm-generic/mm-arch-hooks.h
 delete mode 100644 include/linux/mm-arch-hooks.h

-- 
2.10.1