netdev - Re: [PATCH net-next] net: ks8851: Fix mixed module/builtin build

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Message-ID: <YAGuA8O0lr19l5lH@lunn.ch>
Date:   Fri, 15 Jan 2021 16:00:19 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Marek Vasut <marex@...x.de>
Cc:     netdev@...r.kernel.org, Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH net-next] net: ks8851: Fix mixed module/builtin build

On Fri, Jan 15, 2021 at 02:42:39PM +0100, Marek Vasut wrote:
> When either the SPI or PAR variant is compiled as module AND the other
> variant is compiled as built-in, the following build error occurs:
> 
> arm-linux-gnueabi-ld: drivers/net/ethernet/micrel/ks8851_common.o: in function `ks8851_probe_common':
> ks8851_common.c:(.text+0x1564): undefined reference to `__this_module'
> 
> Fix this by including the ks8851_common.c in both ks8851_spi.c and
> ks8851_par.c. The DEBUG macro is defined in ks8851_common.c, so it
> does not have to be defined again.

DEBUG should not be defined for production code. So i would remove it
altogether.

There is kconfig'ury you can use to make them both the same. But i'm
not particularly good with it.

    Andrew