In file included from <command-line>:
./drivers/gpu/drm/i915/display/intel_fbdev.h: In function ‘intel_fbdev_framebuffer’:
./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: error: ‘NULL’ undeclared (first use in this function)
   32 |         return NULL;
      |                ^~~~
./drivers/gpu/drm/i915/display/intel_fbdev.h:1:1: note: ‘NULL’ is defined in header ‘<stddef.h>’; did you forget to ‘#include <stddef.h>’?
  +++ |+#include <stddef.h>
    1 | /* SPDX-License-Identifier: MIT */
./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: note: each undeclared identifier is reported only once for each function it appears in
   32 |         return NULL;
      |                ^~~~

Build fails if CONFIG_DRM_FBDEV_EMULATION is n, add missing header file.

Fixes: 9fa154f40eb6 ("drm/{i915,xe}: Run DRM default client setup")
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
index ca2c8c438f02..89bad3a2b01a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.h
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -6,6 +6,8 @@
 #ifndef __INTEL_FBDEV_H__
 #define __INTEL_FBDEV_H__
 
+#include <linux/types.h>
+
 struct drm_fb_helper;
 struct drm_fb_helper_surface_size;
 struct drm_i915_private;
-- 
2.34.1

Am 15.03.25 um 13:01 schrieb Yue Haibing:
> In file included from <command-line>:
> ./drivers/gpu/drm/i915/display/intel_fbdev.h: In function ‘intel_fbdev_framebuffer’:
> ./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: error: ‘NULL’ undeclared (first use in this function)
>     32 |         return NULL;
>        |                ^~~~
> ./drivers/gpu/drm/i915/display/intel_fbdev.h:1:1: note: ‘NULL’ is defined in header ‘<stddef.h>’; did you forget to ‘#include <stddef.h>’?
>    +++ |+#include <stddef.h>
>      1 | /* SPDX-License-Identifier: MIT */
> ./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: note: each undeclared identifier is reported only once for each function it appears in
>     32 |         return NULL;
>        |                ^~~~
>
> Build fails if CONFIG_DRM_FBDEV_EMULATION is n, add missing header file.
>
> Fixes: 9fa154f40eb6 ("drm/{i915,xe}: Run DRM default client setup")
> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/i915/display/intel_fbdev.h | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
> index ca2c8c438f02..89bad3a2b01a 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbdev.h
> +++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
> @@ -6,6 +6,8 @@
>   #ifndef __INTEL_FBDEV_H__
>   #define __INTEL_FBDEV_H__
>   
> +#include <linux/types.h>
> +
>   struct drm_fb_helper;
>   struct drm_fb_helper_surface_size;
>   struct drm_i915_private;

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

On Mon, 17 Mar 2025, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Am 15.03.25 um 13:01 schrieb Yue Haibing:
>> In file included from <command-line>:
>> ./drivers/gpu/drm/i915/display/intel_fbdev.h: In function ‘intel_fbdev_framebuffer’:
>> ./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: error: ‘NULL’ undeclared (first use in this function)
>>     32 |         return NULL;
>>        |                ^~~~
>> ./drivers/gpu/drm/i915/display/intel_fbdev.h:1:1: note: ‘NULL’ is defined in header ‘<stddef.h>’; did you forget to ‘#include <stddef.h>’?
>>    +++ |+#include <stddef.h>
>>      1 | /* SPDX-License-Identifier: MIT */
>> ./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: note: each undeclared identifier is reported only once for each function it appears in
>>     32 |         return NULL;
>>        |                ^~~~
>>
>> Build fails if CONFIG_DRM_FBDEV_EMULATION is n, add missing header file.
>>
>> Fixes: 9fa154f40eb6 ("drm/{i915,xe}: Run DRM default client setup")
>> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
>
> Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

Merged to drm-intel-next, thanks for the patch and ack.

BR,
Jani.

>
>> ---
>>   drivers/gpu/drm/i915/display/intel_fbdev.h | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
>> index ca2c8c438f02..89bad3a2b01a 100644
>> --- a/drivers/gpu/drm/i915/display/intel_fbdev.h
>> +++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
>> @@ -6,6 +6,8 @@
>>   #ifndef __INTEL_FBDEV_H__
>>   #define __INTEL_FBDEV_H__
>>   
>> +#include <linux/types.h>
>> +
>>   struct drm_fb_helper;
>>   struct drm_fb_helper_surface_size;
>>   struct drm_i915_private;

-- 
Jani Nikula, Intel