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Message-ID: <40a56c8d-d519-47a8-b7b6-29339fad1cb4@linux.ibm.com>
Date: Mon, 5 Feb 2024 10:23:00 -0500
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Subject: Re: [PATCH 6/6] s390: vfio-ap: make matrix_bus const
To: "Ricardo B. Marliere" <ricardo@marliere.net>,
        Vineeth Vijayan <vneethv@linux.ibm.com>,
        Peter Oberparleiter <oberpar@linux.ibm.com>,
        Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
        Harald Freudenberger <freude@linux.ibm.com>,
        Halil Pasic <pasic@linux.ibm.com>, Jason Herne <jjherne@linux.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20240203-bus_cleanup-s390-v1-0-ac891afc7282@marliere.net>
 <20240203-bus_cleanup-s390-v1-6-ac891afc7282@marliere.net>
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From: Anthony Krowiak <akrowiak@linux.ibm.com>
In-Reply-To: <20240203-bus_cleanup-s390-v1-6-ac891afc7282@marliere.net>
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Reviewed-by: Anthony Krowiak <akrowiak@linux.ibm.com>

On 2/3/24 9:58 AM, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the matrix_bus 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@linuxfoundation.org>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---
>   drivers/s390/crypto/vfio_ap_drv.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
> index a5ab03e42ff1..4aeb3e1213c7 100644
> --- a/drivers/s390/crypto/vfio_ap_drv.c
> +++ b/drivers/s390/crypto/vfio_ap_drv.c
> @@ -60,7 +60,7 @@ static void vfio_ap_matrix_dev_release(struct device *dev)
>   	kfree(matrix_dev);
>   }
>   
> -static struct bus_type matrix_bus = {
> +static const struct bus_type matrix_bus = {
>   	.name = "matrix",
>   };
>   
>