Re: [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast()

[Michael S. Tsirkin]

On Wed, Aug 18, 2021 at 08:06:31PM +0800, Xie Yongji wrote:
> Export alloc_iova_fast() and free_iova_fast() so that
> some modules can make use of the per-CPU cache to get
> rid of rbtree spinlock in alloc_iova() and free_iova()
> during IOVA allocation.
> 
> Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>


This needs ack from iommu maintainers. Guys?

> ---
>  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)
> -- 
> 2.11.0