On Monday, December 08, 2008 11:34 pm Stephen Rothwell wrote:
> Hi Dave,
>
> Today's linux-next build (powerpc allyesconfig) failed like this:
>
> drivers/gpu/drm/drm_gem.c: In function 'drm_gem_mmap':
> drivers/gpu/drm/drm_gem.c:519: error: '_PAGE_CACHE_WC' undeclared (first
> use in this function)
>
> Caused by commit 33b801854540a4f5205c0b2b4b91987e7f21af08 ("drm: GEM mmap
> support"). I tried to revert just that commit, but it lead me down a
> road of dependent commits, so I have reverted the whole drm tree for
> today.
>
> _PAGE_CACHE_WC appears to be defined only for x86 and, before the above
> commit, was not used outside arch/x86.
We might be able to use the new pgprot_writecombine function, but I think
that's only in an x86 branch atm... And it doesn't look like it's properly
stubbed out on non-x86, which means more #ifdefs.
--
Jesse Barnes, Intel Open Source Technology Center
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