Re: [PATCH] drm/amd/display: include missing linux/delay.h

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Hi Arnd.

On Mon, Jun 17, 2019 at 02:38:55PM +0200, Arnd Bergmann wrote:
> Some randconfig builds fail to compile the dcn10 code because of
> a missing declaration:
> 
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c: In function 'dcn10_apply_ctx_for_surface':
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:2378:3: error: implicit declaration of function 'udelay' [-Werror=implicit-function-declaration]
> 
> Include the appropriate kernel header.
> 
> Fixes: 9ed43ef84d9d ("drm/amd/display: Add Underflow Asserts to dc")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
> index 1ac9a4f03990..d87ddc7de9c6 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
> @@ -22,6 +22,7 @@
>   * Authors: AMD
>   *
>   */
> +#include <linux/delay.h>
>  
>  #include <linux/delay.h>
>  #include "dm_services.h"

Something has gone wrong here, as you add a second include of linux/delay.h.

We had this problem before, which Alex fixed by applying a patch to
include linux/delay.h


	Sam
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