On Tue, Aug 23, 2016 at 04:50:24PM +0100, Chris Wilson wrote:
> PAGE_KERNEL_IO is an x86-ism. Though it is used to define the pgprot_t
> used for the iomapped region, it itself is just PAGE_KERNEL. On all
> other arches, PAGE_KERNEL_IO is undefined so in a general header we must
> refrain from using it.
>
> v2: include pgtable for pgprot_combine()
>
> Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> Fixes: cafaf14a5d8f ("io-mapping: Always create a struct to hold metadata about the io-mapping")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
This one seems to have worked out, applied to dinq.
Thanks, Daniel
> ---
> include/linux/io-mapping.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
> index b4c4b5c4216d..a87dd7fffc0a 100644
> --- a/include/linux/io-mapping.h
> +++ b/include/linux/io-mapping.h
> @@ -112,7 +112,7 @@ io_mapping_unmap(void __iomem *vaddr)
> #else
>
> #include <linux/uaccess.h>
> -#include <asm/pgtable_types.h>
> +#include <asm/pgtable.h>
>
> /* Create the io_mapping object*/
> static inline struct io_mapping *
> @@ -123,7 +123,7 @@ io_mapping_init_wc(struct io_mapping *iomap,
> iomap->base = base;
> iomap->size = size;
> iomap->iomem = ioremap_wc(base, size);
> - iomap->prot = pgprot_writecombine(PAGE_KERNEL_IO);
> + iomap->prot = pgprot_writecombine(PAGE_KERNEL);
>
> return iomap;
> }
> --
> 2.9.3
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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