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Date:   Tue, 14 Apr 2020 20:47:22 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Saeed Mahameed <saeedm@...lanox.com>
Cc:     "jgg@...pe.ca" <jgg@...pe.ca>,
        "narmstrong@...libre.com" <narmstrong@...libre.com>,
        "masahiroy@...nel.org" <masahiroy@...nel.org>,
        "Laurent.pinchart@...asonboard.com" 
        <Laurent.pinchart@...asonboard.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "leon@...nel.org" <leon@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "nico@...xnic.net" <nico@...xnic.net>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "kieran.bingham+renesas@...asonboard.com" 
        <kieran.bingham+renesas@...asonboard.com>,
        "jani.nikula@...ux.intel.com" <jani.nikula@...ux.intel.com>,
        "a.hajda@...sung.com" <a.hajda@...sung.com>,
        "jonas@...boo.se" <jonas@...boo.se>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "jernej.skrabec@...l.net" <jernej.skrabec@...l.net>
Subject: Re: [RFC 0/6] Regressions for "imply" behavior change

On Tue, Apr 14, 2020 at 7:49 PM Saeed Mahameed <saeedm@...lanox.com> wrote:
> On Tue, 2020-04-14 at 17:25 +0200, Arnd Bergmann wrote:
> > On Tue, Apr 14, 2020 at 5:23 PM Jason Gunthorpe <jgg@...pe.ca> wrote:
> > Correct.
> >
>
> Great !
>
> Then bottom line we will change mlx5/Kconfig: to
>
> depends on VXLAN || !VXLAN

Ok

> This will force MLX5_CORE to m when necessary to make vxlan reachable
> to mlx5_core.  So no need for explicit use of IS_REACHABLE().
> in mlx5 there are 4 of these:
>
>         imply PTP_1588_CLOCK
>         imply VXLAN
>         imply MLXFW
>         imply PCI_HYPERV_INTERFACE

As mentioned earlier, we do need to replace the 'imply PTP_1588_CLOCK'
with the same

         depends on PTP_1588_CLOCK || !PTP_1588_CLOCK

So far I have not seen problems for the other two options, so I assume they
are fine for now -- it seems to build just fine without PCI_HYPERV_INTERFACE,
and MLXFW has no other dependencies, meaning that 'imply' is the
same as 'select' here. Using 'select MLXFW' would make it clearer perhaps.

      Arnd

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