Re: [PATCH] io-mapping: Fixup for different names of writecombine

[Joonas Lahtinen <joonas.lahtinen@linux.intel.com>]

On ti, 2016-08-23 at 22:22 +0200, Daniel Vetter wrote:
> Somehow architectures can't agree on this. And for good measure make
> sure we have a fallback which should work everywhere (fingers
> crossed).
> 
> This is to fix a compile fail on microblaze in gpiolib-of.c, which
> misguidedly includes io-mapping.h (instead of screaming at whichever
> achitecture doesn't correctly pull in asm/io.h from linux/io.h).
> 
> Not tested since there's no reasonable way to get at microblaze
> toolchains :(
> 
> Fixes: ac96b5566926 ("io-mapping.h: s/PAGE_KERNEL_IO/PAGE_KERNEL/")
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: linux-mm@kvack.org
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  include/linux/io-mapping.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
> index a87dd7fffc0a..f4e33756c09c 100644
> --- a/include/linux/io-mapping.h
> +++ b/include/linux/io-mapping.h
> @@ -123,7 +123,13 @@ io_mapping_init_wc(struct io_mapping *iomap,
>  	iomap->base = base;
>  	iomap->size = size;
>  	iomap->iomem = ioremap_wc(base, size);
> +#ifdef pgprot_noncached_wc /* archs can't agree on a name ... */
> +	iomap->prot = pgprot_noncached_wc(PAGE_KERNEL);
> +#elif pgprot_writecombine

Maybe you meant #elif defined pgprot_writecombine?

Regards, Joonas

>  	iomap->prot = pgprot_writecombine(PAGE_KERNEL);
> +#else
> +	iomap->prot = pgprot_noncached(PAGE_KERNEL);
> +#endif
>  
>  	return iomap;
>  }
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation

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