linux-kernel - Re: [PATCH 3/3] iommu: s390: constify iommu

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Date:   Mon, 28 Aug 2017 17:54:54 +0200
From:   Gerald Schaefer <gerald.schaefer@...ibm.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     m.szyprowski@...sung.com, joro@...tes.org, kgene@...nel.org,
        krzk@...nel.org, matthias.bgg@...il.com,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-s390@...r.kernel.org
Subject: Re: [PATCH 3/3] iommu: s390: constify iommu_ops

On Mon, 28 Aug 2017 17:42:50 +0530
Arvind Yadav <arvind.yadav.cs@...il.com> wrote:

> iommu_ops are not supposed to change at runtime.
> Functions 'bus_set_iommu' working with const iommu_ops provided
> by <linux/iommu.h>. So mark the non-const structs as const.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
> ---
>  drivers/iommu/s390-iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Gerald Schaefer <gerald.schaefer@...ibm.com>

> 
> diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
> index 8788640..400d75f 100644
> --- a/drivers/iommu/s390-iommu.c
> +++ b/drivers/iommu/s390-iommu.c
> @@ -327,7 +327,7 @@ static size_t s390_iommu_unmap(struct iommu_domain *domain,
>  	return size;
>  }
> 
> -static struct iommu_ops s390_iommu_ops = {
> +static const struct iommu_ops s390_iommu_ops = {
>  	.capable = s390_iommu_capable,
>  	.domain_alloc = s390_domain_alloc,
>  	.domain_free = s390_domain_free,