[Intel-gfx] [PATCH] drm/i915: Treat ringbuffer vaddress type properly when vmapped

[Chris Wilson]

On Fri, Oct 30, 2015 at 01:39:24PM +0200, Mika Kuoppala wrote:
> commit def0c5f6b0cd ("drm/i915: Map the ringbuffer using WB on LLC machines")
> enhanced ringbuffer access by vmapping the object instead of doing ioremap.
> 
> The address space annotations however have been and should
> remain to be __iomem, in order to get warnings if we
> dereference the virtual addresses directly instead of using
> proper accessors.
> 
> To keep sparse happy, use explicit casts to __iomem and back
> when we are wb capable.

Or you could review the patch on list to remove the incorrect iomem.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre