Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/dce_v8_0.c:185: warning: Function parameter or 
member 'async' not described in 'dce_v8_0_page_flip'

Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: "Christian König" <christian.koe...@amd.com>
Cc: David Airlie <airl...@linux.ie>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Luben Tuikov <luben.tui...@amd.com>
Cc: amd-...@lists.freedesktop.org
Cc: dri-de...@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
---
 drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c 
b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 7973183fa335e..224b30214427f 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -176,6 +176,7 @@ static void dce_v8_0_pageflip_interrupt_fini(struct 
amdgpu_device *adev)
  * @adev: amdgpu_device pointer
  * @crtc_id: crtc to cleanup pageflip on
  * @crtc_base: new address of the crtc (GPU MC address)
+ * @async: asynchronous flip
  *
  * Triggers the actual pageflip by updating the primary
  * surface base address.
-- 
2.25.1

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