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SubjectRe: [PATCH 1/2] MIPS: define ioremap_nocache to ioremap
Hi Christoph,

On Mon, Dec 09, 2019 at 02:58:21PM +0100, Christoph Hellwig wrote:
> They are both defined the same way, but this makes it easier to validate
> the scripted ioremap_nocache removal following soon.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Acked-by: Paul Burton <paulburton@kernel.org>

Thanks,
Paul

> ---
> arch/mips/include/asm/io.h | 25 ++-----------------------
> 1 file changed, 2 insertions(+), 23 deletions(-)
>
> diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
> index 3f6ce74335b4..d9caa811a2fa 100644
> --- a/arch/mips/include/asm/io.h
> +++ b/arch/mips/include/asm/io.h
> @@ -227,29 +227,8 @@ static inline void __iomem *ioremap_prot(phys_addr_t offset,
> */
> #define ioremap(offset, size) \
> __ioremap_mode((offset), (size), _CACHE_UNCACHED)
> -
> -/*
> - * ioremap_nocache - map bus memory into CPU space
> - * @offset: bus address of the memory
> - * @size: size of the resource to map
> - *
> - * ioremap_nocache performs a platform specific sequence of operations to
> - * make bus memory CPU accessible via the readb/readw/readl/writeb/
> - * writew/writel functions and the other mmio helpers. The returned
> - * address is not guaranteed to be usable directly as a virtual
> - * address.
> - *
> - * This version of ioremap ensures that the memory is marked uncachable
> - * on the CPU as well as honouring existing caching rules from things like
> - * the PCI bus. Note that there are other caches and buffers on many
> - * busses. In particular driver authors should read up on PCI writes
> - *
> - * It's useful if some control registers are in such an area and
> - * write combining or read caching is not desirable:
> - */
> -#define ioremap_nocache(offset, size) \
> - __ioremap_mode((offset), (size), _CACHE_UNCACHED)
> -#define ioremap_uc ioremap_nocache
> +#define ioremap_nocache ioremap
> +#define ioremap_uc ioremap
>
> /*
> * ioremap_cache - map bus memory into CPU space
> --
> 2.20.1
>

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