[PATCH v2] iommu/core: Remove comment reference to iommu_dev_has_feature

[John Garry]

On 07/02/2022 03:23, Akeem G Abodunrin wrote:
> iommu_dev_has_feature() api has been removed by the commit 262948f8ba573
> ("iommu: Delete iommu_dev_has_feature()") - So this patch removes comment
> about the api to avoid any confusion.
> 
> Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin at intel.com>
> Cc: Lu Baolu <baolu.lu at linux.intel.com>
> Reviewed-by: Christoph Hellwig <hch at lst.de>

Reviewed-by: John Garry <john.garry at huawei.com>

BTW, It looks like we can get rid of iommu_ops.dev_has_feat also.

It does not seem to be called, while arm-smmu-v3 driver does provide a 
callback.

> ---
>   include/linux/iommu.h | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index de0c57a567c8..bea054f2bd4d 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -153,8 +153,7 @@ struct iommu_resv_region {
>    *			 supported, this feature must be enabled before and
>    *			 disabled after %IOMMU_DEV_FEAT_SVA.
>    *
> - * Device drivers query whether a feature is supported using
> - * iommu_dev_has_feature(), and enable it using iommu_dev_enable_feature().
> + * Device drivers enable the feature via iommu_dev_enable_feature().
>    */
>   enum iommu_dev_features {
>   	IOMMU_DEV_FEAT_AUX,