Re: [PATCH v10 01/17] iova: Export alloc_iova_fast() and free_iova_fast()

[Jason Wang]

在 2021/7/29 下午3:34, Xie Yongji 写道:
> Export alloc_iova_fast() and free_iova_fast() so that
> some modules can use it to improve iova allocation efficiency.


It's better to explain why alloc_iova() is not sufficient here.

Thanks


> Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
> ---
>   drivers/iommu/iova.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
> index b6cf5f16123b..3941ed6bb99b 100644
> --- a/drivers/iommu/iova.c
> +++ b/drivers/iommu/iova.c
> @@ -521,6 +521,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
>   
>   	return new_iova->pfn_lo;
>   }
> +EXPORT_SYMBOL_GPL(alloc_iova_fast);
>   
>   /**
>    * free_iova_fast - free iova pfn range into rcache
> @@ -538,6 +539,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size)
>   
>   	free_iova(iovad, pfn);
>   }
> +EXPORT_SYMBOL_GPL(free_iova_fast);
>   
>   #define fq_ring_for_each(i, fq) \
>   	for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)