linux-kernel - Re: [PATCH 3/8] IB/odp: export rbt_ib_umem_for_each_in

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Message-ID: <55AE0309.4090606@mellanox.com>
Date:	Tue, 21 Jul 2015 11:30:01 +0300
From:	Haggai Eran <haggaie@...lanox.com>
To:	Jérôme Glisse <jglisse@...hat.com>,
	<linux-kernel@...r.kernel.org>, <linux-rdma@...r.kernel.org>
CC:	Christophe Harle <charle@...dia.com>,
	Duncan Poole <dpoole@...dia.com>,
	Sherry Cheung <SCheung@...dia.com>,
	Subhash Gutti <sgutti@...dia.com>,
	"John Hubbard" <jhubbard@...dia.com>,
	Mark Hairgrove <mhairgrove@...dia.com>,
	Lucien Dunning <ldunning@...dia.com>,
	Cameron Buschardt <cabuschardt@...dia.com>,
	Arvind Gopalakrishnan <arvindg@...dia.com>,
	"Shachar Raindel" <raindel@...lanox.com>,
	Liran Liss <liranl@...lanox.com>
Subject: Re: [PATCH 3/8] IB/odp: export rbt_ib_umem_for_each_in_range()

On 17/07/2015 22:01, Jérôme Glisse wrote:
> The mlx5 driver will need this function for its driver specific bit
> of ODP (on demand paging) on HMM (Heterogeneous Memory Management).
> 
> Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
> ---
>  drivers/infiniband/core/umem_rbtree.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/infiniband/core/umem_rbtree.c b/drivers/infiniband/core/umem_rbtree.c
> index 727d788..f030ec0 100644
> --- a/drivers/infiniband/core/umem_rbtree.c
> +++ b/drivers/infiniband/core/umem_rbtree.c
> @@ -92,3 +92,4 @@ int rbt_ib_umem_for_each_in_range(struct rb_root *root,
>  
>  	return ret_val;
>  }
> +EXPORT_SYMBOL(rbt_ib_umem_for_each_in_range);
> 

Perhaps it would be better if the driver didn't access the internal
rbtree directly, and instead used something like an
ib_mirror_for_each_range() to do this.
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