linux-kernel - Re: [PATCH] IB/mad: Use ID allocator routines to allocate agent number

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Message-ID: <20180530151023.GB30754@ziepe.ca>
Date:   Wed, 30 May 2018 09:10:23 -0600
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Hans Westgaard Ry <hans.westgaard.ry@...cle.com>
Cc:     jackm <jackm@....mellanox.co.il>,
        Håkon Bugge <haakon.bugge@...cle.com>,
        Doug Ledford <dledford@...hat.com>,
        Daniel Jurgens <danielj@...lanox.com>,
        Parav Pandit <parav@...lanox.com>,
        Pravin Shedge <pravin.shedge4linux@...il.com>,
        OFED mailing list <linux-rdma@...r.kernel.org>,
        linux-kernel@...r.kernel.org, Leon Romanovsky <leon@...nel.org>
Subject: Re: [PATCH] IB/mad: Use ID allocator routines to allocate agent
 number

On Wed, May 30, 2018 at 02:22:56PM +0200, Hans Westgaard Ry wrote:

> We came up with this code snippet which we think handles both preventing
> immediate re-use and too big/wrapping...

Isn't this basically the same as idr_alloc_cyclic ?

Jason