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Date:   Mon, 22 Feb 2021 12:46:45 -0400
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     Leon Romanovsky <leon@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
        Zhu Yanjun <zyjzyj2000@gmail.com>,
        Julian Braha <julianbraha@gmail.com>,
        Doug Ledford <dledford@redhat.com>,
        RDMA mailing list <linux-rdma@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drivers: infiniband: sw: rxe: fix kconfig dependency on
 CRYPTO
Message-ID: <20210222164645.GK2643399@ziepe.ca>
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On Mon, Feb 22, 2021 at 08:26:10AM -0800, Randy Dunlap wrote:
> On 2/22/21 7:58 AM, Jason Gunthorpe wrote:
> > On Mon, Feb 22, 2021 at 03:00:03PM +0200, Leon Romanovsky wrote:
> >> On Mon, Feb 22, 2021 at 10:39:20AM +0800, Zhu Yanjun wrote:
> >>> On Sun, Feb 21, 2021 at 2:49 PM Leon Romanovsky <leon@kernel.org> wrote:
> >>>>
> >>>> On Fri, Feb 19, 2021 at 06:32:26PM -0500, Julian Braha wrote:
> >>>>> commit 6e61907779ba99af785f5b2397a84077c289888a
> >>>>> Author: Julian Braha <julianbraha@gmail.com>
> >>>>> Date:   Fri Feb 19 18:20:57 2021 -0500
> >>>>>
> >>>>>     drivers: infiniband: sw: rxe: fix kconfig dependency on CRYPTO
> >>>>>
> >>>>>     When RDMA_RXE is enabled and CRYPTO is disabled,
> >>>>>     Kbuild gives the following warning:
> >>>>>
> >>>>>     WARNING: unmet direct dependencies detected for CRYPTO_CRC32
> >>>>>       Depends on [n]: CRYPTO [=n]
> >>>>>       Selected by [y]:
> >>>>>       - RDMA_RXE [=y] && (INFINIBAND_USER_ACCESS [=y] || !INFINIBAND_USER_ACCESS [=y]) && INET [=y] && PCI [=y] && INFINIBAND [=y] && INFINIBAND_VIRT_DMA [=y]
> >>>>>
> >>>>>     This is because RDMA_RXE selects CRYPTO_CRC32,
> >>>>>     without depending on or selecting CRYPTO, despite that config option
> >>>>>     being subordinate to CRYPTO.
> >>>>>
> >>>>>     Signed-off-by: Julian Braha <julianbraha@gmail.com>
> >>>>
> >>>> Please use git sent-email to send patches and please fix crypto Kconfig
> >>>> to enable CRYPTO if CRYPTO_* selected.
> >>>>
> >>>> It is a little bit awkward to request all users of CRYPTO_* to request
> >>>> select CRYPTO too.
> >>>
> >>> The same issue and similar patch is in this link:
> >>>
> >>> https://patchwork.kernel.org/project/linux-rdma/patch/20200915101559.33292-1-fazilyildiran@gmail.com/#23615747
> >>
> >> So what prevents us from fixing CRYPTO Kconfig?
> > 
> > Yes, I would like to see someone deal with this properly, either every
> > place doing select CRYPTO_XX needs fixing or something needs to be
> > done in the crypto layer.
> > 
> > I have no idea about kconfig to give advice, I've added Arnd since he
> > always seems to know :)
> 
> I will Ack the original patch in this thread.

The one from Julian?

> How many Mellanox drivers are you concerned about?

?? This is about rxe

> You don't have to fix any other drivers that have a similar issue.

Why shouldn't they be fixed too?

There is nearly 1000 places that use a 'select CRYPTO_*' in the
kernel.

I see only 60 'select CRYPTO' statements.

Jason