[PATCH v5 3/4] arch/*/io.h: remove ioremap_uc in some architectures

Arnd Bergmann arnd at arndb.de
Thu Sep 21 22:27:14 AEST 2023

On Thu, Sep 21, 2023, at 07:04, Baoquan He wrote:
> 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.
> Signed-off-by: Baoquan He <bhe at redhat.com>
> Acked-by: Geert Uytterhoeven <geert at linux-m68k.org>
> Acked-by: Michael Ellerman <mpe at ellerman.id.au> (powerpc)
> Acked-by: Helge Deller <deller at gmx.de>  # parisc
> Cc: linux-alpha at vger.kernel.org
> Cc: linux-hexagon at vger.kernel.org
> Cc: linux-m68k at lists.linux-m68k.org
> Cc: linux-mips at vger.kernel.org
> Cc: linux-parisc at vger.kernel.org
> Cc: linuxppc-dev at lists.ozlabs.org
> Cc: linux-sh at vger.kernel.org
> Cc: sparclinux at vger.kernel.org

Acked-by: Arnd Bergmann <arnd at arndb.de>

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