linux-kernel - Re: [PATCH 5/6] s390: AP: make ap_bus

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Message-ID: <696c7ded128d46addc16ecafa6128822@linux.ibm.com>
Date: Mon, 05 Feb 2024 11:36:32 +0100
From: Harald Freudenberger <freude@...ux.ibm.com>
To: "Ricardo B. Marliere" <ricardo@...liere.net>
Cc: Vineeth Vijayan <vneethv@...ux.ibm.com>,
        Peter Oberparleiter
 <oberpar@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik
 <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian
 Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle
 <svens@...ux.ibm.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>,
        Halil Pasic
 <pasic@...ux.ibm.com>,
        Jason Herne <jjherne@...ux.ibm.com>,
        Greg
 Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] s390: AP: make ap_bus_type const

On 2024-02-03 15:58, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the ap_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/s390/crypto/ap_bus.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/s390/crypto/ap_bus.c 
> b/drivers/s390/crypto/ap_bus.c
> index f46dd6abacd7..2ecf4d36e78b 100644
> --- a/drivers/s390/crypto/ap_bus.c
> +++ b/drivers/s390/crypto/ap_bus.c
> @@ -135,7 +135,7 @@ static int ap_max_domain_id = 15;
>  /* Maximum adapter id, if not given via qci */
>  static int ap_max_adapter_id = 63;
> 
> -static struct bus_type ap_bus_type;
> +static const struct bus_type ap_bus_type;
> 
>  /* Adapter interrupt definitions */
>  static void ap_interrupt_handler(struct airq_struct *airq,
> @@ -1603,7 +1603,7 @@ static struct attribute *ap_bus_attrs[] = {
>  };
>  ATTRIBUTE_GROUPS(ap_bus);
> 
> -static struct bus_type ap_bus_type = {
> +static const struct bus_type ap_bus_type = {
>  	.name = "ap",
>  	.bus_groups = ap_bus_groups,
>  	.match = &ap_bus_match,

Reviewed-by: Harald Freudenberger <freude@...ux.ibm.com>