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Date:   Mon, 20 Mar 2017 20:17:16 -0400 (EDT)
From:   Nicolas Pitre <nicolas.pitre@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
cc:     Grygorii Strashko <grygorii.strashko@...com>,
        "David S. Miller" <davem@...emloft.net>, stable@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        John Stultz <john.stultz@...aro.org>,
        WingMan Kwok <w-kwok2@...com>,
        Uwe Kleine-K├Ânig 
        <u.kleine-koenig@...gutronix.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2, -net] cpsw/netcp: cpts depends on posix_timers

On Mon, 20 Mar 2017, Arnd Bergmann wrote:

> With posix timers having become optional, we get a build error with
> the cpts time sync option of the CPSW driver:
> 
> drivers/net/ethernet/ti/cpts.c: In function 'cpts_find_ts':
> drivers/net/ethernet/ti/cpts.c:291:23: error: implicit declaration of function 'ptp_classify_raw';did you mean 'ptp_classifier_init'? [-Werror=implicit-function-declaration]
> 
> This adds a hard dependency on PTP_CLOCK to avoid the problem, as
> building it without PTP support makes no sense anyway.
> 
> Fixes: baa73d9e478f ("posix-timers: Make them configurable")
> Cc: Nicolas Pitre <nicolas.pitre@...aro.org>
> Cc: stable@...r.kernel.org
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Nicolas Pitre <nico@...aro.org>

> ---
> v2: use 'depends on' instead of 'select' as suggested by Nico.
> ---
>  drivers/net/ethernet/ti/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
> index d923890a9fda..9e631952b86f 100644
> --- a/drivers/net/ethernet/ti/Kconfig
> +++ b/drivers/net/ethernet/ti/Kconfig
> @@ -76,7 +76,7 @@ config TI_CPSW
>  config TI_CPTS
>  	bool "TI Common Platform Time Sync (CPTS) Support"
>  	depends on TI_CPSW || TI_KEYSTONE_NETCP
> -	imply PTP_1588_CLOCK
> +	depends on PTP_1588_CLOCK
>  	---help---
>  	  This driver supports the Common Platform Time Sync unit of
>  	  the CPSW Ethernet Switch and Keystone 2 1g/10g Switch Subsystem.
> -- 
> 2.9.0
> 
> 

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