On 3/10/23 02:45, Baoquan He wrote:

On 03/09/23 at 03:36pm, Thomas Bogendoerfer wrote:

quoted

On Wed, Mar 08, 2023 at 09:07:09PM +0800, Baoquan He wrote:

quoted

ioremap_uc() is only meaningful on old x86-32 systems with the PAT
extension, and on ia64 with its slightly unconventional ioremap()
behavior. So remove the ioremap_uc() definition in architecutures
other than x86 and ia64. These architectures all have asm-generic/io.h
included and will have the default ioremap_uc() definition which
returns NULL.

This changes the existing behaviour, while no need to worry about
any breakage because in the only callsite of ioremap_uc(), code
has been adjusted to eliminate the impact. Please see
atyfb_setup_generic() of drivers/video/fbdev/aty/atyfb_base.c.

If any new invocation of ioremap_uc() need be added, please consider
using ioremap() intead or adding a ARCH specific version if necessary.

Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Baoquan He <redacted>
Cc: linux-alpha@vger.kernel.org
Cc: linux-hexagon@vger.kernel.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-mips@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
---
  Documentation/driver-api/device-io.rst | 9 +++++----
  arch/alpha/include/asm/io.h            | 1 -
  arch/hexagon/include/asm/io.h          | 3 ---
  arch/m68k/include/asm/kmap.h           | 1 -
  arch/mips/include/asm/io.h             | 1 -
  arch/parisc/include/asm/io.h           | 2 --
  arch/powerpc/include/asm/io.h          | 1 -
  arch/sh/include/asm/io.h               | 2 --
  arch/sparc/include/asm/io_64.h         | 1 -
  9 files changed, 5 insertions(+), 16 deletions(-)

this doesn't apply to v6.3-rc1... what tree is this based on ?

Sorry, I forgot mentioning this in cover letter. This series is
followup of below patchset, so it's on top of below patchset and based
on v6.3-rc1.

https://lore.kernel.org/all/20230301034247.136007-1-bhe@redhat.com/T/#u (local)
[PATCH v5 00/17] mm: ioremap:  Convert architectures to take GENERIC_IOREMAP way

I've applied both patch series on top of v6.3-rc1 and
tested it with success on the parisc platform (32- and 64-bit kernel).

You may add to both patch series:

Acked-by: Helge Deller <deller@gmx.de>  # parisc

Thank you!
Helge