Am 04.09.23 um 16:39 schrieb Thomas Zimmermann:
[...]

At least two drivers could use __FB_DEFAULT_DEFERRED_OPS_MMAP: 
picolcd-fb and hyperv_fb. At some point, we might want to set/clear 

Both drivers are already in this patchset.

fb_mmap depending on some Kconfig value. Having 
__FB_DEFAULT_DEFERRED_OPS_MMAP might be helpful then.

quoted

Alternatively, __FB_DEFAULT_DEFERRED_OPS_MMAP() could still be left but
not taking a __prefix argument since that is not used anyways ?

The driver optionally provides mmap without deferred I/O, hence the mmap 
function. That makes no sense, as these writes to the buffer would never 
make it to the device memory. But I didn't want to remove the code 
either. So I just left the existing function as-is. Usually, the 
deferred-I/O mmap is called immediately. [1]

Best regards
Thomas

[1] 
https://elixir.bootlin.com/linux/v6.5.1/source/drivers/video/fbdev/smscufx.c#L784

quoted

-- 
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)