linux-kernel - Re: [PATCH net-next] net: phy: Constify struct mdio_device

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Message-ID: <9dfeb860-3c0c-4f16-a150-fdce133281e8@lunn.ch>
Date: Sun, 12 Jan 2025 17:46:55 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: Michael Hennerich <michael.hennerich@...log.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
	Richard Cochran <richardcochran@...il.com>,
	Marek Behún <kabel@...nel.org>,
	Daniel Golle <daniel@...rotopia.org>,
	Qingfang Deng <dqfext@...il.com>,
	SkyLake Huang <SkyLake.Huang@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Arun Ramadoss <arun.ramadoss@...rochip.com>,
	UNGLinuxDriver@...rochip.com, Xu Liang <lxu@...linear.com>,
	Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
	Andrei Botila <andrei.botila@....nxp.com>,
	Heiko Stuebner <heiko@...ech.de>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-amlogic@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH net-next] net: phy: Constify struct mdio_device_id

On Sun, Jan 12, 2025 at 03:14:50PM +0100, Christophe JAILLET wrote:
> 'struct mdio_device_id' is not modified in these drivers.
> 
> Constifying these structures moves some data to a read-only section, so
> increase overall security.
> 
> On a x86_64, with allmodconfig, as an example:
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>   27014	  12792	      0	  39806	   9b7e	drivers/net/phy/broadcom.o
> 
> After:
> =====
>    text	   data	    bss	    dec	    hex	filename
>   27206	  12600	      0	  39806	   9b7e	drivers/net/phy/broadcom.o
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Seems sensible.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

Is the long terms goal to make MODULE_DEVICE_TABLE() enforce the
const?

    Andrew