linux-kernel - Re: [PATCH 1/2] usb: cdc-wdm: Fix check for WWAN

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Date:   Wed, 29 Sep 2021 21:38:39 +0200
From:   Rikard Falkeborn <rikard.falkeborn@...il.com>
To:     Rikard Falkeborn <rikard.falkeborn@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Oliver Neukum <oneukum@...e.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Junlin Yang <yangjunlin@...ong.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] usb: cdc-wdm: Fix check for WWAN

On Wed, Sep 29, 2021 at 03:21:42PM +0200, Rikard Falkeborn wrote:
> Commit 5c912e679506 ("usb: cdc-wdm: fix build error when CONFIG_WWAN_CORE
> is not set") fixed a build error when CONFIG_WWAN was set but
> CONFIG_WWAN_CORE was not. Since then CONFIG_WWAN_CORE was removed and
> joined with CONFIG_WWAN in commit 89212e160b81 ("net: wwan: Fix WWAN
> config symbols").
> 
> Also, since CONFIG_WWAN has class tri-state instead of bool, we cannot
> check if it is defined directly, but have to use IS_DEFINED() instead.

That last part is wrong, sorry for the noise. I'll send a V2.

Rikard