linux-kernel - Re: linux-next: manual merge of the char-misc tree with the net-next tree

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Date:   Tue, 22 Mar 2022 09:53:22 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Greg KH <greg@...ah.com>, Arnd Bergmann <arnd@...db.de>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Vinod Koul <vkoul@...nel.org>
Subject: Re: linux-next: manual merge of the char-misc tree with the net-next tree

Hi Stephen,

On Tue, Mar 15, 2022 at 6:45 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Today's linux-next merge of the char-misc tree got a conflict in:
>
>   drivers/phy/freescale/Kconfig
>
> between commit:
>
>   8f73b37cf3fb ("phy: add support for the Layerscape SerDes 28G")
>
> from the net-next tree and commit:
>
>   3d565bd6fbbb ("phy: freescale: i.MX8 PHYs should depend on ARCH_MXC && ARM64")
>
> from the char-misc tree.
>
> I fixed it up (I think, see below) and can carry the fix as necessary.
> This is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.

> --- a/drivers/phy/freescale/Kconfig
> +++ b/drivers/phy/freescale/Kconfig
> @@@ -23,12 -26,4 +26,14 @@@ config PHY_FSL_IMX8M_PCI
>           Enable this to add support for the PCIE PHY as found on
>           i.MX8M family of SOCs.
>
>  +config PHY_FSL_LYNX_28G
>  +      tristate "Freescale Layerscape Lynx 28G SerDes PHY support"
>  +      depends on OF
>  +      select GENERIC_PHY
>  +      help
>  +        Enable this to add support for the Lynx SerDes 28G PHY as
>  +        found on NXP's Layerscape platforms such as LX2160A.
>  +        Used to change the protocol running on SerDes lanes at runtime.
>  +        Only useful for a restricted set of Ethernet protocols.
> ++
> + endif

The above resolution is not correct: Layerscape is a different SoC
family than i.MX8, using ARCH_LAYERSCAPE instead of ARCH_MXC.

Hence PHY_FSL_LYNX_28G should be moved outside the if/endif block
(and gain a dependency on ARCH_LAYERSCAPE || COMPILE_TEST; I will
 send a patch).

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds