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Date:   Thu, 16 Mar 2017 20:13:23 -0700 (PDT)
From:   David Miller <>
Subject: Re: [RESEND PATCH -net] cpsw/netcp: work around reverse cpts

From: Arnd Bergmann <>
Date: Mon, 13 Mar 2017 17:59:04 +0100

> The dependency is reversed: cpsw and netcp call into cpts,
> but cpts depends on the other two in Kconfig. This can lead
> to cpts being a loadable module and its callers built-in:
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_remove':
> cpsw.c:(.text.cpsw_remove+0xd0): undefined reference to `cpts_release'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_rx_handler':
> cpsw.c:(.text.cpsw_rx_handler+0x2dc): undefined reference to `cpts_rx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_tx_handler':
> cpsw.c:(.text.cpsw_tx_handler+0x7c): undefined reference to `cpts_tx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_ndo_stop':
> As a workaround, I'm introducing another Kconfig symbol to
> control the compilation of cpts, while making the actual
> module controlled by a silent symbol that is =y when necessary.
> Fixes: 6246168b4a38 ("net: ethernet: ti: netcp: add support of cpts")
> Signed-off-by: Arnd Bergmann <>
> Reviewed-by: Grygorii Strashko <>
> ---
> Originally submitted on Dec 16, still needed for v4.10 and v4.11-rc2

I'm fine with this change, but please keep the user visible Kconfig
symbol name the same, use the new name for the internal one.

I know that this means you have to make more changes elsewhere in
order to accomplish this.

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