linux-kernel - Re: [PATCH] ice: require PTP clock for building

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Message-ID: <1d3dc6d5-7191-ef5c-7f09-8911c4b4fa15@intel.com>
Date:   Mon, 25 Sep 2023 09:59:22 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>
CC:     Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "Paolo Abeni" <pabeni@...hat.com>,
        Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
        Michal Michalik <michal.michalik@...el.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Joshua Hay <joshua.a.hay@...el.com>,
        "Vadim Fedorenko" <vadim.fedorenko@...ux.dev>,
        <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ice: require PTP clock for building

On 9/25/2023 8:55 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> A previous fix added PTP as an optional dependency, which was correct as
> of commit 87758511075ec ("igc: fix build errors for PTP"), but this
> has recently changed with the PTP code getting more deeply integrated
> into the ICE driver.
> 
> Trying to build ICE when PTP is disabled results in this internal link failure
> as the local functions are left out of the driver:
> 
> ERROR: modpost: "ice_is_clock_mux_present_e810t" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_is_phy_rclk_present" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_cgu_get_pin_name" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_get_cgu_state" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_is_cgu_present" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_get_cgu_rclk_pin_info" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_cgu_get_pin_type" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> ERROR: modpost: "ice_cgu_get_pin_freq_supp" [drivers/net/ethernet/intel/ice/ice.ko] undefined!
> 
> I tried rearranging the code to allow building it again, but this was getting
> too complicated for an outsider, so just enforce the dependency to fix randconfig
> builds again, until someone wants to clean this up again.

Hi Arnd,

There's a pending patch to netdev that does this [1].

Thanks,
Tony

> In practice, any configuration that includes this driver is also going to
> want PTP clocks anyway.
> 
> Fixes: 8a3a565ff210a ("ice: add admin commands to access cgu configuration")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

[1] 
https://lore.kernel.org/netdev/20230921000633.1238097-1-jacob.e.keller@intel.com/