linux-kernel - Re: [PATCH] siox: make siox_bus

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Message-ID: <oixce2fflwe6rodxsv625ogbymqlblw7qvvbxmtp7tpgarqpju@ufnqi7j364md>
Date: Sun, 4 Feb 2024 22:29:51 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: "Ricardo B. Marliere" <ricardo@...liere.net>
Cc: Thorsten Scherer <t.scherer@...elmann.de>, 
	Pengutronix Kernel Team <kernel@...gutronix.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] siox: make siox_bus_type const

Hello Ricardo,

On Sun, Feb 04, 2024 at 05:36:03PM -0300, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the siox_bus_type variable to be a constant structure as well,
> placing it into read-only memory which can not be modified at runtime.
> 
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
> ---
>  drivers/siox/siox-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
> index 561408583b2b..a1eda7bd76ed 100644
> --- a/drivers/siox/siox-core.c
> +++ b/drivers/siox/siox-core.c
> @@ -543,7 +543,7 @@ static void siox_shutdown(struct device *dev)
>  		sdriver->shutdown(sdevice);
>  }
>  
> -static struct bus_type siox_bus_type = {
> +static const struct bus_type siox_bus_type = {
>  	.name = "siox",
>  	.match = siox_match,
>  	.probe = siox_probe,

while I like this change, I wonder about the "Now" in the commit log.
Doing the homework, this is about commit d492cc2573a0 ("driver core:
device.h: make struct bus_type a const *") which is in 6.4-rc1. Would
you please care to mention that commit as the one that makes this siox
change possible?

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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