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Message-ID: <4fa2f7bd9f9fd0d908e6a5ffee19bfd7dc6bde1b.camel@oracle.com>
Date: Thu, 4 Sep 2025 22:43:41 +0000
From: Allison Henderson <allison.henderson@...cle.com>
To: "horms@...nel.org" <horms@...nel.org>,
        Haakon Bugge
	<haakon.bugge@...cle.com>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org"
	<kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>
CC: "rds-devel@....oracle.com" <rds-devel@....oracle.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v3] rds: ib: Remove unused extern definition

On Thu, 2025-09-04 at 17:01 +0200, Håkon Bugge wrote:
> In the old days, RDS used FMR (Fast Memory Registration) to register
> IB MRs to be used by RDMA. A newer and better verbs based
> registration/de-registration method called FRWR (Fast Registration
> Work Request) was added to RDS by commit 1659185fb4d0 ("RDS: IB:
> Support Fastreg MR (FRMR) memory registration mode") in 2016.
> 
> Detection and enablement of FRWR was done in commit 2cb2912d6563
> ("RDS: IB: add Fastreg MR (FRMR) detection support"). But said commit
> added an extern bool prefer_frmr, which was not used by said commit -
> nor used by later commits. Hence, remove it.
> 
> Signed-off-by: Håkon Bugge <haakon.bugge@...cle.com>
> 
> ---
Hi Håkon,

Just one nit with the change log indentation here.  Version numbering is typically left-aligned, unless you meant to
have a header of sorts to justify the level indentation.  Otherwise just bring the v2 -> v3: / v1 -> v2: lines flush
left.

Content-wise this patch looks fine to me.  With the indent nit fixed, you can add my rvb:
Reviewed-by: Allison Henderson <allison.henderson@...cle.com>

Thank you!

Allison

> 
> 	v2 -> v3:
> 	      * As per Jakub's request, removed Cc: and Fixes: tags
> 	      * Subject to net-next (instead of net)
> 
> 	v1 -> v2:
> 	      * Added commit message
> 	      * Added Cc: stable@...r.kernel.org
> ---
>  net/rds/ib_mr.h | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/net/rds/ib_mr.h b/net/rds/ib_mr.h
> index ea5e9aee4959e..5884de8c6f45b 100644
> --- a/net/rds/ib_mr.h
> +++ b/net/rds/ib_mr.h
> @@ -108,7 +108,6 @@ struct rds_ib_mr_pool {
>  };
>  
>  extern struct workqueue_struct *rds_ib_mr_wq;
> -extern bool prefer_frmr;
>  
>  struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
>  					     int npages);

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