linux-kernel - Re: [PATCH 00/28] iio: zero init stack with { } instead of memset()

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Message-ID: <aErNPaZzvgAps_-b@smile.fi.intel.com>
Date: Thu, 12 Jun 2025 15:51:09 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: David Lechner <dlechner@...libre.com>
Cc: Michael Hennerich <michael.hennerich@...log.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Jonathan Cameron <jic23@...nel.org>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Francesco Dolcini <francesco@...cini.it>,
	João Paulo Gonçalves <jpaulo.silvagoncalves@...il.com>,
	Leonard Göhrs <l.goehrs@...gutronix.de>,
	kernel@...gutronix.de, Oleksij Rempel <o.rempel@...gutronix.de>,
	Roan van Dijk <roan@...tonic.nl>,
	Tomasz Duszynski <tomasz.duszynski@...akon.com>,
	Jacopo Mondi <jacopo@...ndi.org>,
	Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@....com>,
	Mudit Sharma <muditsharma.info@...il.com>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	Ondřej Jirman <megi@....cz>,
	Andreas Klinger <ak@...klinger.de>,
	Petre Rodan <petre.rodan@...dimension.ro>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH 00/28] iio: zero init stack with { } instead of memset()

On Wed, Jun 11, 2025 at 05:38:52PM -0500, David Lechner wrote:
> Jonathan mentioned recently that he would like to get away from using
> memset() to zero-initialize stack memory in the IIO subsystem. And we
> have it on good authority that initializing a struct or array with = { }
> is the preferred way to do this in the kernel [1]. So here is a series
> to take care of that.

I believe we may do that independently of the compilers that can leave garbage
in the padding. In case it happens, it will be good adventure to fix the bugs
in the code, that for some reason take padding(s) into account for the real
values.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

-- 
With Best Regards,
Andy Shevchenko