drm: add helper to clflush a virtual address range
Useful when the page is already mapped to copy date in/out.
For -stable because the next patch (fixing phys obj pwrite) needs this
little helper function.
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 92f0981..d33597b 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1332,6 +1332,7 @@
/* Cache management (drm_cache.c) */
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
+void drm_clflush_virt_range(char *addr, unsigned long length);
/* Locking IOCTL support (drm_lock.h) */
extern int drm_lock(struct drm_device *dev, void *data,