Re: [PATCH 0/5] drop unused BACKLIGHT_GENERIC option

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On Mon, Nov 30, 2020 at 08:11:33PM +0100, Sam Ravnborg wrote:
> On Mon, Nov 30, 2020 at 03:21:32PM +0000, Andrey Zhizhikin wrote:
> > Since the removal of generic_bl driver from the source tree in commit
> > 7ecdea4a0226 ("backlight: generic_bl: Remove this driver as it is
> > unused") BACKLIGHT_GENERIC config option became obsolete as well and
> > therefore subject to clean-up from all configuration files.
> > 
> > This series introduces patches to address this removal, separated by
> > architectures in the kernel tree.
> > 
> > Andrey Zhizhikin (5):
> >   ARM: configs: drop unused BACKLIGHT_GENERIC option
> >   arm64: defconfig: drop unused BACKLIGHT_GENERIC option
> >   MIPS: configs: drop unused BACKLIGHT_GENERIC option
> >   parisc: configs: drop unused BACKLIGHT_GENERIC option
> >   powerpc/configs: drop unused BACKLIGHT_GENERIC option
> 
> For defconfigs I expect arch maintainers to do a make xxxdefconfig / make
> savedefconfig / cp defconfig ... run now and then - this will remove
> all such symbols.

savedefconfig can be tricky because of risk of loosing options:
1. it will remove options which became the default or became selected,
2. later when the default is changed or selecting option is removed, the
   first option from #1 will not be brought back.

This was already for example with DEBUG_FS and the conclusion that time
was - do not run savedefconfig automatically.

Therefore if some symbol(s) can be safely removed, patch is welcomed.

Best regards,
Krzysztof

> 
> If the patches goes in like they are submitted then:
> Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>



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