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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	"Daniel Lezcano" <daniel.lezcano@linaro.org>,
	"Zhang Rui" <rui.zhang@intel.com>,
	"Lukasz Luba" <lukasz.luba@arm.com>,
	"Support Opensource" <support.opensource@diasemi.com>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Fabio Estevam" <festevam@gmail.com>,
	"Niklas Söderlund" <niklas.soderlund@ragnatech.se>,
	"Geert Uytterhoeven" <geert+renesas@glider.be>,
	"Magnus Damm" <magnus.damm@gmail.com>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	"AngeloGioacchino Del Regno"
	<angelogioacchino.delregno@collabora.com>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	linux-pm@vger.kernel.org, imx@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org,
	linux-renesas-soc@vger.kernel.org,
	linux-mediatek@lists.infradead.org
Subject: Re: [PATCH] thermal: Constify struct thermal_zone_device_ops
Date: Mon, 26 May 2025 09:29:16 +0200	[thread overview]
Message-ID: <87v7pn3k4z.fsf@bootlin.com> (raw)
In-Reply-To: <5bba3bf0139e2418b306a0f9a2f1f81ef49e88a6.1748165978.git.christophe.jaillet@wanadoo.fr> (Christophe JAILLET's message of "Sun, 25 May 2025 11:40:04 +0200")

Hello,

On 25/05/2025 at 11:40:04 +02, Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:

> 'struct thermal_zone_device_ops' are not modified in these drivers.
>
> Constifying these structures moves some data to a read-only section, so
> increases overall security, especially when the structure holds some
> function pointers.
>
> On a x86_64, with allmodconfig, as an example:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>   28116	   5168	    128	  33412	   8284	drivers/thermal/armada_thermal.o
>
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>   28244	   5040	    128	  33412	   8284	drivers/thermal/armada_thermal.o
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only
> ---
>  drivers/thermal/armada_thermal.c                        | 2 +-

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> # For Armada

Thanks,
Miquèl

  parent reply	other threads:[~2025-05-26  7:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-25  9:40 [PATCH] thermal: Constify struct thermal_zone_device_ops Christophe JAILLET
2025-05-25 10:19 ` Niklas Söderlund
2025-05-26  7:29 ` Miquel Raynal [this message]
2025-05-28 16:00 ` Frank Li
2025-07-15 13:26 ` Daniel Lezcano

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