From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Matti Vaittinen <mazziesaccount@gmail.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
"Matti Vaittinen" <matti.vaittinen@fi.rohmeurope.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Lars-Peter Clausen" <lars@metafoo.de>,
linux-iio <linux-iio@vger.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 07/14] iio: ltc2688: Simplify using devm_regulator_*get_enable()
Date: Sat, 20 Aug 2022 20:41:39 +0300 [thread overview]
Message-ID: <CAHp75Vd3vyAZbWpZT9SmyD=ecGTAdVNWK=fs_n4OSAqGtGj_gg@mail.gmail.com> (raw)
In-Reply-To: <01fec744-f3d4-b633-d3ce-bcd86a153132@gmail.com>
On Sat, Aug 20, 2022 at 8:30 PM Matti Vaittinen
<mazziesaccount@gmail.com> wrote:
>
> On 8/20/22 19:09, Andy Shevchenko wrote:
> > On Sat, Aug 20, 2022 at 4:45 PM Matti Vaittinen
> > <mazziesaccount@gmail.com> wrote:
> >> On 8/20/22 14:21, Jonathan Cameron wrote:
> >>> On Fri, 19 Aug 2022 22:19:17 +0300
> >>> Matti Vaittinen <mazziesaccount@gmail.com> wrote:
...
> >>> For the whole static / vs non static. My personal preference is not
> >>> to have the static marking but I don't care that much.
> >>
> >> I'd like to stick with the static here. I know this one particular array
> >> does not have much of a footprint - but I'd like to encourage the habit
> >> of considering the memory usage. This discussion serves as an example of
> >> how unknown the impact of making const data static is. I didn't know
> >> this myself until Sebastian educated me :) Hence my strong preference
> >> on keeping this 'static' as an example for others who are as ignorant as
> >> I were ;) After all, having const data arrays static is quite an easy
> >> way of improving things - and it really does matter when there is many
> >> of arrays - or when they contain large data.
> >
> > But still the same comment about global scope of the variable is applied.
>
> I don't understand why you keep claiming the variable is global when it
> is not?
It is. The static keyword makes it global, but putting the entire
definition into the function is asking for troubles.
I guess some C standard chapter describes that in non-understandable language.
> > As I explained before, hiding global variables inside a function is a
> > bad code practice.
>
> I don't really get what you mean here. And I definitely don't see any
> improvement if we would really use a global variable instead of a local one.
The improvement is avoid hiding the global variable to the local namespace.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2022-08-20 17:42 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-19 19:16 [PATCH v3 00/14] Use devm helpers for regulator get and enable Matti Vaittinen
2022-08-19 19:17 ` [PATCH v3 01/14] docs: devres: regulator: Add new get_enable functions to devres.rst Matti Vaittinen
2022-08-19 19:17 ` [PATCH v3 02/14] clk: cdce925: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-10-17 23:07 ` Stephen Boyd
2022-08-19 19:18 ` [PATCH v3 03/14] gpu: drm: simplify drivers using devm_regulator_*get_enable*() Matti Vaittinen
2022-08-29 14:25 ` Robert Foss
2022-08-30 7:04 ` Matti Vaittinen
2022-08-19 19:18 ` [PATCH v3 04/14] hwmon: lm90: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-08-19 19:18 ` [PATCH v3 05/14] hwmon: adm1177: " Matti Vaittinen
2022-08-19 19:36 ` Guenter Roeck
2022-08-19 19:19 ` [PATCH v3 06/14] iio: ad7192: Simplify " Matti Vaittinen
2022-10-16 15:59 ` Jonathan Cameron
2022-08-19 19:19 ` [PATCH v3 07/14] iio: ltc2688: Simplify using devm_regulator_*get_enable() Matti Vaittinen
2022-08-20 11:21 ` Jonathan Cameron
2022-08-20 13:38 ` Matti Vaittinen
2022-08-20 16:09 ` Andy Shevchenko
2022-08-20 17:30 ` Matti Vaittinen
2022-08-20 17:41 ` Andy Shevchenko [this message]
2022-08-20 19:00 ` Matti Vaittinen
2022-08-21 13:13 ` Andy Shevchenko
2022-08-22 8:13 ` Vaittinen, Matti
2022-08-22 19:14 ` Jonathan Cameron
2022-08-30 11:34 ` Sa, Nuno
2022-10-16 16:04 ` Jonathan Cameron
2022-08-19 19:19 ` [PATCH v3 08/14] iio: bmg160_core: " Matti Vaittinen
2022-08-19 23:30 ` Andy Shevchenko
2022-08-20 6:19 ` Vaittinen, Matti
2022-08-20 6:25 ` Andy Shevchenko
2022-08-20 6:48 ` Vaittinen, Matti
2022-08-20 7:18 ` Andy Shevchenko
2022-08-20 10:05 ` Matti Vaittinen
2022-08-20 16:21 ` Andy Shevchenko
2022-08-20 17:27 ` Matti Vaittinen
2022-08-21 13:08 ` Andy Shevchenko
2022-08-22 5:50 ` Vaittinen, Matti
2022-08-20 11:38 ` Jonathan Cameron
2022-08-20 13:20 ` Matti Vaittinen
2022-08-20 11:22 ` Jonathan Cameron
2022-08-20 13:26 ` Matti Vaittinen
2022-10-16 16:08 ` Jonathan Cameron
2022-10-17 4:28 ` Matti Vaittinen
2022-08-19 19:19 ` [PATCH v3 09/14] iio: st_lsm6dsx: " Matti Vaittinen
2022-10-16 16:11 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 10/14] iio: ad7476: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-08-30 11:44 ` Sa, Nuno
2022-10-16 16:12 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 11/14] iio: ad7606: " Matti Vaittinen
2022-08-30 11:46 ` Sa, Nuno
2022-08-30 12:54 ` Matti Vaittinen
2022-10-16 16:15 ` Jonathan Cameron
2022-10-16 16:24 ` Jonathan Cameron
2022-10-17 4:32 ` Matti Vaittinen
2022-08-19 19:20 ` [PATCH v3 12/14] iio: max1241: " Matti Vaittinen
2022-08-19 19:58 ` Alexandru Lazar
2022-10-16 16:17 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 13/14] iio: max1363: " Matti Vaittinen
2022-08-30 11:50 ` Sa, Nuno
2022-10-16 16:18 ` Jonathan Cameron
2022-10-16 16:37 ` Jonathan Cameron
2022-08-19 19:21 ` [PATCH v3 14/14] iio: hmc425a: " Matti Vaittinen
2022-08-30 11:49 ` Sa, Nuno
2022-08-30 13:00 ` Matti Vaittinen
2022-08-30 13:55 ` Sa, Nuno
2022-10-16 16:20 ` Jonathan Cameron
2022-08-19 23:27 ` [PATCH v3 00/14] Use devm helpers for regulator get and enable Andy Shevchenko
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