linux-kernel - [PATCH v2 00/23] Use asm-generic for mmu

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Message-Id: <20200826145249.745432-1-npiggin@gmail.com>
Date:   Thu, 27 Aug 2020 00:52:26 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     linux-arch@...r.kernel.org
Cc:     Nicholas Piggin <npiggin@...il.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2 00/23] Use asm-generic for mmu_context no-op functions

It would be nice to be able to modify mmu_context functions or add a
hook without updating all architectures, many of which will be no-ops.

The motivation for this series is a change to lazy mmu handling, but
this series stands on its own as a good cleanup whether or not we end
up making that change.

Arnd, is this something you could take through your asm-generic tree?
(assuming arch maintainers are okay with it)

Thanks,
Nick

Since v1:
- Added acks and feedback from various people.
- Fixed a nommu build error caught by ktp.
- Dropped unicore32.

Nicholas Piggin (23):
  asm-generic: add generic MMU versions of mmu context functions
  alpha: use asm-generic/mmu_context.h for no-op implementations
  arc: use asm-generic/mmu_context.h for no-op implementations
  arm: use asm-generic/mmu_context.h for no-op implementations
  arm64: use asm-generic/mmu_context.h for no-op implementations
  csky: use asm-generic/mmu_context.h for no-op implementations
  hexagon: use asm-generic/mmu_context.h for no-op implementations
  ia64: use asm-generic/mmu_context.h for no-op implementations
  m68k: use asm-generic/mmu_context.h for no-op implementations
  microblaze: use asm-generic/mmu_context.h for no-op implementations
  mips: use asm-generic/mmu_context.h for no-op implementations
  nds32: use asm-generic/mmu_context.h for no-op implementations
  nios2: use asm-generic/mmu_context.h for no-op implementations
  openrisc: use asm-generic/mmu_context.h for no-op implementations
  parisc: use asm-generic/mmu_context.h for no-op implementations
  powerpc: use asm-generic/mmu_context.h for no-op implementations
  riscv: use asm-generic/mmu_context.h for no-op implementations
  s390: use asm-generic/mmu_context.h for no-op implementations
  sh: use asm-generic/mmu_context.h for no-op implementations
  sparc: use asm-generic/mmu_context.h for no-op implementations
  um: use asm-generic/mmu_context.h for no-op implementations
  x86: use asm-generic/mmu_context.h for no-op implementations
  xtensa: use asm-generic/mmu_context.h for no-op implementations

 arch/alpha/include/asm/mmu_context.h         | 12 ++---
 arch/arc/include/asm/mmu_context.h           | 17 +++---
 arch/arm/include/asm/mmu_context.h           | 26 ++-------
 arch/arm64/include/asm/mmu_context.h         |  9 ++--
 arch/csky/include/asm/mmu_context.h          |  8 ++-
 arch/hexagon/include/asm/mmu_context.h       | 33 ++----------
 arch/ia64/include/asm/mmu_context.h          | 17 ++----
 arch/m68k/include/asm/mmu_context.h          | 47 +++-------------
 arch/microblaze/include/asm/mmu_context.h    |  2 +-
 arch/microblaze/include/asm/mmu_context_mm.h |  8 +--
 arch/microblaze/include/asm/processor.h      |  3 --
 arch/mips/include/asm/mmu_context.h          | 11 ++--
 arch/nds32/include/asm/mmu_context.h         | 10 +---
 arch/nios2/include/asm/mmu_context.h         | 21 ++------
 arch/openrisc/include/asm/mmu_context.h      |  8 ++-
 arch/parisc/include/asm/mmu_context.h        | 12 ++---
 arch/powerpc/include/asm/mmu_context.h       | 22 +++-----
 arch/riscv/include/asm/mmu_context.h         | 22 +-------
 arch/s390/include/asm/mmu_context.h          |  9 ++--
 arch/sh/include/asm/mmu_context.h            |  7 ++-
 arch/sh/include/asm/mmu_context_32.h         |  9 ----
 arch/sparc/include/asm/mmu_context_32.h      | 10 ++--
 arch/sparc/include/asm/mmu_context_64.h      | 10 ++--
 arch/um/include/asm/mmu_context.h            | 12 ++---
 arch/x86/include/asm/mmu_context.h           |  6 +++
 arch/xtensa/include/asm/mmu_context.h        | 11 ++--
 arch/xtensa/include/asm/nommu_context.h      | 26 +--------
 include/asm-generic/mmu_context.h            | 57 +++++++++++++++-----
 include/asm-generic/nommu_context.h          | 19 +++++++
 29 files changed, 166 insertions(+), 298 deletions(-)
 create mode 100644 include/asm-generic/nommu_context.h

-- 
2.23.0