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SubjectRe: [PATCH v3 2/3] hwmon: da9063: HWMON driver
On Sun, 11 Jul 2021 02:55:02 +0000, Vincent Pelletier <plr.vincent@gmail.com> wrote:
> On Sat, 10 Jul 2021 09:08:13 -0700, Guenter Roeck <linux@roeck-us.net> wrote:
> > Unnecessary include.
> [...]
> > I don't immediately see where this include is needed. Is this a
> > leftover ?
> [...]
> > Same here.
>
> Are there ways to systematically tell which includes are useless
> besides commenting them out all and uncommenting until it compiles ?
> (if that is even a good idea)

I tried this, just to get a baseline: the module compiles with just
linux/hwmon.h
linux/mfd/da9063/core.h
linux/module.h
linux/platform_device.h
linux/regmap.h

Beyond what you suggested this also gets rid of:
- seems reasonable:
- linux/delay.h
- linux/init.h
- linux/slab.h
- looks suspicious to me:
- linux/err.h, which means the error constants are indirectly
imported. Removing it feels brittle.
- linux/kernel.h, although to my surprise a lot of c files do not
include it.

By default I'll drop the former and keep the latter in the
next version, please let me know if another combination is preferred.
--
Vincent Pelletier
GPG fingerprint 983A E8B7 3B91 1598 7A92 3845 CAC9 3691 4257 B0C1

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