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drm: add helper to check for wc memory support

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commit 4b0e4e4af6 upstream.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Airlie
2016-01-30 07:59:32 +02:00
committed by Greg Kroah-Hartman
parent ac6f949bbb
commit f4eb8334b5
1 changed files with 9 additions and 0 deletions
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9
include/drm/drm_cache.h
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@@ -35,4 +35,13 @@
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
static inline bool drm_arch_can_wc_memory(void)
{
#if defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
return false;
#else
return true;
#endif
}
#endif