Jani Nikula [off-list ref] writes:

On Mon, 04 Mar 2024, Jani Nikula [off-list ref] wrote:

quoted

Removal of the backlight include from fb.h uncovered an implicit
dependency in powerpc asm/backlight.h. Add the explicit include.

Reported-by: Naresh Kamboju <redacted>
Closes: https://lore.kernel.org/r/CA+G9fYsAk5TbqqxFC2W4oHLGA0CbTHMxbeq8QayFXTU75YiueA@mail.gmail.com (local)
Fixes: 11b4eedfc87d ("fbdev: Do not include <linux/backlight.h> in header")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Jani Nikula <redacted>

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Not even compile tested!

Naresh, please try this patch!

Michael, if this is fine by you, ack to merge via the drm subsystem
along with the regressing commit?

I prefer Thomas' patch, but I'm fine with either to go in via drm.

cheers