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SubjectRe: [PATCH v5 1/4] sparc64: implement ioremap_uc
On Thu, Oct 17, 2019 at 7:47 PM Tuowen Zhao <ztuowen@gmail.com> wrote:
> On sparc64, the whole physical IO address space is accessible using
> physically addressed loads and stores. *_uc does nothing like the
> others.
>
> Cc: <stable@vger.kernel.org>
> Reported-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Tuowen Zhao <ztuowen@gmail.com>
> ---
> arch/sparc/include/asm/io_64.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
> index 688911051b44..f4afa301954a 100644
> --- a/arch/sparc/include/asm/io_64.h
> +++ b/arch/sparc/include/asm/io_64.h
> @@ -407,6 +407,7 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
> }
>
> #define ioremap_nocache(X,Y) ioremap((X),(Y))
> +#define ioremap_uc(X,Y) ioremap((X),(Y))
> #define ioremap_wc(X,Y) ioremap((X),(Y))
> #define ioremap_wt(X,Y) ioremap((X),(Y))

Do we really need this? There is only one user of ioremap_uc(), which
Christoph is trying hard to get rid of, and the new devres helper that
triggers all of this :-(
https://lore.kernel.org/dri-devel/20191112105507.GA7122@lst.de/

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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