From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Herve Codina <herve.codina@bootlin.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Jonathan Cameron <jic23@kernel.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v4 07/13] minmax: Introduce {min,max}_array()
Date: Wed, 14 Jun 2023 12:02:57 +0300 [thread overview]
Message-ID: <CAHp75Vcur=H_2mBm5Ztuvd7Jnvmr6+tvCbEkFtmaVLsEjXr8NQ@mail.gmail.com> (raw)
In-Reply-To: <20230614074904.29085-8-herve.codina@bootlin.com>
On Wed, Jun 14, 2023 at 10:49 AM Herve Codina <herve.codina@bootlin.com> wrote:
>
> Introduce min_array() (resp max_array()) in order to get the
> minimal (resp maximum) of values present in an array.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
See a remark below.
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> ---
> include/linux/minmax.h | 36 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/include/linux/minmax.h b/include/linux/minmax.h
> index 396df1121bff..2cd0d34ce921 100644
> --- a/include/linux/minmax.h
> +++ b/include/linux/minmax.h
> @@ -133,6 +133,42 @@
> */
> #define max_t(type, x, y) __careful_cmp((type)(x), (type)(y), >)
>
> +/*
> + * Do not check the array parameter using __must_be_array().
> + * In the following legit use-case where the "array" passed is a simple pointer,
> + * __must_be_array() will return a failure.
> + * --- 8< ---
> + * int *buff
> + * ...
> + * min = min_array(buff, nb_items);
> + * --- 8< ---
> + */
> +#define __minmax_array(op, array, len) ({ \
> + typeof(array) __array = (array); \
> + typeof(len) __len = (len); \
> + typeof(__array[0] + 0) __element = __array[--__len]; \
Do we need the ' + 0' part?
> + while (__len--) \
> + __element = op(__element, __array[__len]); \
> + __element; })
> +
> +/**
> + * min_array - return minimum of values present in an array
> + * @array: array
> + * @len: array length
> + *
> + * Note that @len must not be zero (empty array).
> + */
> +#define min_array(array, len) __minmax_array(min, array, len)
> +
> +/**
> + * max_array - return maximum of values present in an array
> + * @array: array
> + * @len: array length
> + *
> + * Note that @len must not be zero (empty array).
> + */
> +#define max_array(array, len) __minmax_array(max, array, len)
> +
> /**
> * clamp_t - return a value clamped to a given range using a given type
> * @type: the type of variable to use
> --
> 2.40.1
>
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-06-14 9:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 7:48 [PATCH v4 00/13] Add support for IIO devices in ASoC Herve Codina
2023-06-14 7:48 ` [PATCH v4 01/13] ASoC: dt-bindings: Add audio-iio-aux Herve Codina
2023-06-14 7:48 ` [PATCH v4 02/13] ASoC: dt-bindings: simple-card: Add additional-devs subnode Herve Codina
2023-06-14 7:48 ` [PATCH v4 03/13] iio: inkern: Check error explicitly in iio_channel_read_max() Herve Codina
2023-06-14 7:48 ` [PATCH v4 04/13] iio: consumer.h: Fix raw values documentation notes Herve Codina
2023-06-14 7:48 ` [PATCH v4 05/13] iio: inkern: Remove the 'unused' variable usage in iio_channel_read_max() Herve Codina
2023-06-14 7:48 ` [PATCH v4 06/13] iio: inkern: Fix headers inclusion order Herve Codina
2023-06-14 8:58 ` Andy Shevchenko
2023-06-14 7:48 ` [PATCH v4 07/13] minmax: Introduce {min,max}_array() Herve Codina
2023-06-14 9:02 ` Andy Shevchenko [this message]
2023-06-14 9:42 ` Herve Codina
2023-06-14 11:51 ` Andy Shevchenko
2023-06-14 20:34 ` Herve Codina
2023-06-14 22:05 ` Andy Shevchenko
2023-06-15 9:35 ` Herve Codina
2023-06-15 13:51 ` Andy Shevchenko
2023-06-16 9:08 ` David Laight
2023-06-16 11:48 ` Herve Codina
2023-06-16 12:42 ` David Laight
2023-06-14 7:48 ` [PATCH v4 08/13] iio: inkern: Use max_array() to get the maximum value from an array Herve Codina
2023-06-14 9:03 ` Andy Shevchenko
2023-06-14 7:49 ` [PATCH v4 09/13] iio: inkern: Replace a FIXME comment by a TODO one Herve Codina
2023-06-14 7:49 ` [PATCH v4 10/13] iio: inkern: Add a helper to query an available minimum raw value Herve Codina
2023-06-14 7:49 ` [PATCH v4 11/13] ASoC: soc-dapm.h: Convert macros to return a compound literal Herve Codina
2023-06-14 7:49 ` [PATCH v4 12/13] ASoC: codecs: Add support for the generic IIO auxiliary devices Herve Codina
2023-06-14 7:49 ` [PATCH v4 13/13] ASoC: simple-card: Handle additional devices Herve Codina
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAHp75Vcur=H_2mBm5Ztuvd7Jnvmr6+tvCbEkFtmaVLsEjXr8NQ@mail.gmail.com' \
--to=andy.shevchenko@gmail.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=christophe.leroy@csgroup.eu \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=herve.codina@bootlin.com \
--cc=jic23@kernel.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=kuninori.morimoto.gx@renesas.com \
--cc=lars@metafoo.de \
--cc=lgirdwood@gmail.com \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=perex@perex.cz \
--cc=robh+dt@kernel.org \
--cc=thomas.petazzoni@bootlin.com \
--cc=tiwai@suse.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).