linux-kernel - Re: [PATCH] eth: fbnic: Fix modpost undefined error

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Message-ID: <19a47bf1-44cc-4c01-d515-36b5f982a4fe@huawei.com>
Date: Tue, 3 Sep 2024 11:21:19 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: Simon Horman <horms@...nel.org>
CC: <alexanderduyck@...com>, <kuba@...nel.org>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <pabeni@...hat.com>, <andrew@...n.ch>,
	<kernel-team@...a.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] eth: fbnic: Fix modpost undefined error



On 2024/9/3 3:06, Simon Horman wrote:
> On Mon, Sep 02, 2024 at 09:19:47PM +0800, Jinjie Ruan wrote:
>> When CONFIG_FBNIC=m, the following error occurs:
>>
>> 	ERROR: modpost: "priv_to_devlink" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "page_pool_create" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_info_serial_number_put" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "page_pool_alloc_pages" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_priv" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "page_pool_put_unrefed_page" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_unregister" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_alloc_ns" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_register" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>> 	ERROR: modpost: "devlink_free" [drivers/net/ethernet/meta/fbnic/fbnic.ko] undefined!
>>
>> The driver now uses functions exported from a helper module
>> but fails to link when the helper is disabled, select them to fix them
>>
>> Fixes: 546dd90be979 ("eth: fbnic: Add scaffolding for Meta's NIC driver")
>> Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
> 
> Thanks,
> 
> I believe a patch for this problem is already present upstream.

Sorry, I compile the mainline kernel and find this problem, and not
notice it.

> 
> - 9a95b7a89dff ("eth: fbnic: select DEVLINK and PAGE_POOL")
>   https://git.kernel.org/netdev/net-next/c/9a95b7a89dff
>