netdev - Re: [PATCH net-next] net: dsa: hellcreek: Add missing TAPRIO dependency

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Date:   Fri, 29 Jan 2021 08:41:30 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Kurt Kanzenbach <kurt@...utronix.de>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: dsa: hellcreek: Add missing TAPRIO
 dependency

On 1/29/21 6:26 AM, Kurt Kanzenbach wrote:
> On Thu Jan 28 2021, Randy Dunlap wrote:
>> On 1/28/21 8:33 AM, Kurt Kanzenbach wrote:
>>> Add missing dependency to TAPRIO to avoid build failures such as:
>>>
>>> |ERROR: modpost: "taprio_offload_get" [drivers/net/dsa/hirschmann/hellcreek_sw.ko] undefined!
>>> |ERROR: modpost: "taprio_offload_free" [drivers/net/dsa/hirschmann/hellcreek_sw.ko] undefined!
>>>
>>> Fixes: 24dfc6eb39b2 ("net: dsa: hellcreek: Add TAPRIO offloading support")
>>> Reported-by: Randy Dunlap <rdunlap@...radead.org>
>>> Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
>>> ---
>>>  drivers/net/dsa/hirschmann/Kconfig | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> Note: It's not against net, because the fixed commit is not in net tree, yet.
>>>
>>> diff --git a/drivers/net/dsa/hirschmann/Kconfig b/drivers/net/dsa/hirschmann/Kconfig
>>> index e01191107a4b..9ea2c643f8f8 100644
>>> --- a/drivers/net/dsa/hirschmann/Kconfig
>>> +++ b/drivers/net/dsa/hirschmann/Kconfig
>>> @@ -5,6 +5,7 @@ config NET_DSA_HIRSCHMANN_HELLCREEK
>>>  	depends on NET_DSA
>>>  	depends on PTP_1588_CLOCK
>>>  	depends on LEDS_CLASS
>>> +	depends on NET_SCH_TAPRIO
>>>  	select NET_DSA_TAG_HELLCREEK
>>>  	help
>>>  	  This driver adds support for Hirschmann Hellcreek TSN switches.
>>>
>>
>> Thanks. This fixes the build errors.
>> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
>>  
>>
>> However, I do see this in the build output when
>> NET_DSA_HIRSCHMANN_HELLCREEK is disabled:
>>
>>   AR      drivers/net/dsa/hirschmann/built-in.a
>>
>> That is an empty archive file (8 bytes), which is caused by
>> drivers/net/dsa/Makefile:
>>
>> obj-y				+= hirschmann/
>>
>>
>> Is there some reason that it's not done like this?
>> This passes my y/m/n testing.
> 
> Actually I cannot reproduce this. I've disabled
> NET_DSA_HIRSCHMANN_HELLCREEK and nothing shows up in the build log.

Hmph, I don't see it on a clean build either.
Sorry for the noise.

-- 
~Randy