[GIT PULL v2] asm-generic changes for 6.15

["Arnd Bergmann" <arnd@arndb.de>]

The following changes since commit 2014c95afecee3e76ca4a56956a936e23283f05b:

  Linux 6.14-rc1 (2025-02-02 15:39:26 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git tags/asm-generic-6.15-2

for you to fetch changes up to 47a60391ae0ed04ffbb9bd8dcd94ad9d08b41288:

  rwonce: fix crash by removing READ_ONCE() for unaligned read (2025-03-26 22:16:50 +0100)

----------------------------------------------------------------
asm-generic changes for 6.15

This is mainly set of cleanups of asm-generic/io.h, resolving problems
with inconsistent semantics of ioread64/iowrite64 that were causing
runtime and build issues.

The "GENERIC_IOMAP" version that switches between inb()/outb() and
readb()/writeb() style accessors is now only used on architectures that
have PC-style ISA devices that are not memory mapped (x86, uml, m68k-q40
and powerpc-powernv), while alpha and parisc use a more complicated
variant and everything else just maps the ioread interfaces to plan MMIO
(readb/writeb etc).

In addition there are two small changes from Raag Jadav to simplify
the asm-generic/io.h indirect inclusions and from Jann Horn to fix
a corner case with read_word_at_a_time.

[this is the same content as yesterday, but with the regression
 fix from Jann added on top of his original patch]

----------------------------------------------------------------
Arnd Bergmann (10):
      asm-generic/io.h: rework split ioread64/iowrite64 helpers
      alpha: stop using asm-generic/iomap.h
      sh: remove duplicate ioread/iowrite helpers
      parisc: stop using asm-generic/iomap.h
      powerpc: asm/io.h: remove split ioread64/iowrite64 helpers
      mips: drop GENERIC_IOMAP wrapper
      m68k/nommu: stop using GENERIC_IOMAP
      mips: fix PCI_IOBASE definition
      mips: export pci_iounmap()
      m68k: coldfire: select PCI_IOMAP for PCI

Jann Horn (2):
      rwonce: handle KCSAN like KASAN in read_word_at_a_time()
      rwonce: fix crash by removing READ_ONCE() for unaligned read

Raag Jadav (2):
      drm/draw: include missing headers
      io.h: drop unused headers

 arch/alpha/include/asm/io.h                    |  31 ++---
 arch/m68k/Kconfig                              |   3 +-
 arch/m68k/include/asm/io_no.h                  |   4 -
 arch/mips/Kconfig                              |   2 +-
 arch/mips/include/asm/io.h                     |  25 ++--
 arch/mips/include/asm/mach-loongson64/spaces.h |   5 +-
 arch/mips/include/asm/mach-ralink/spaces.h     |   2 +-
 arch/mips/lib/iomap-pci.c                      |  10 ++
 arch/mips/loongson64/init.c                    |   4 +-
 arch/parisc/include/asm/io.h                   |  36 ++++--
 arch/powerpc/include/asm/io.h                  |  48 --------
 arch/sh/include/asm/io.h                       |  30 +----
 arch/sh/kernel/Makefile                        |   3 -
 arch/sh/kernel/iomap.c                         | 162 -------------------------
 arch/sh/kernel/ioport.c                        |   5 -
 arch/sh/lib/io.c                               |   4 +-
 drivers/gpu/drm/drm_draw.c                     |   2 +
 drivers/sh/clk/cpg.c                           |  25 ++--
 include/asm-generic/iomap.h                    |  36 ++----
 include/asm-generic/rwonce.h                   |  10 +-
 include/linux/io-64-nonatomic-hi-lo.h          |  16 +++
 include/linux/io-64-nonatomic-lo-hi.h          |  16 +++
 include/linux/io.h                             |   3 -
 lib/iomap.c                                    |  40 +++---
 24 files changed, 167 insertions(+), 355 deletions(-)
 delete mode 100644 arch/sh/kernel/iomap.c