linux-kernel - Re: [PATCH 1/2 v2] IB/qib: don't use qib_wc_x86

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Message-ID: <Y4h+B7vEvkgbMbZ7@unreal>
Date:   Thu, 1 Dec 2022 12:12:23 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org,
        Jason Gunthorpe <jgg@...dia.com>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        linux-rdma@...r.kernel.org, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        linux-um@...ts.infradead.org
Subject: Re: [PATCH 1/2 v2] IB/qib: don't use qib_wc_x86_64 for UML

On Thu, Dec 01, 2022 at 10:28:18AM +0100, Johannes Berg wrote:
> On Thu, 2022-12-01 at 11:22 +0200, Leon Romanovsky wrote:
> > 
> > > +++ b/drivers/infiniband/hw/qib/Kconfig
> > > @@ -3,6 +3,7 @@ config INFINIBAND_QIB
> > >  	tristate "Intel PCIe HCA support"
> > >  	depends on 64BIT && INFINIBAND_RDMAVT
> > >  	depends on PCI
> > > +	depends on !UML
> > 
> > I would advocate to add this line to whole drivers/infiniband.
> > None of RDMA code makes sense for UML.
> > 
> 
> You could argue that one might want to eventually use kunit for some
> bits and pieces in there, so it'd make sense to be able to build the
> parts that _can_ be built, but I have no idea :)

But now, we don't have anyone in RDMA who uses kunit. Once it will be
needed, he/she will extend drivers/infiniband to support it.

Thanks

> 
> johannes