linux-kernel - Re: [PATCH v2 7/9] serdev: Introduce new bus for serial attached devices

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Message-ID: <09cdab76-ee1a-45da-699f-a66bf7148579@gmail.com>
Date:   Wed, 18 Jan 2017 12:53:55 +0100
From:   Frédéric Danis <frederic.danis.oss@...il.com>
To:     Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Jiri Slaby <jslaby@...e.com>,
        Sebastian Reichel <sre@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Dr . H . Nikolaus Schaller" <hns@...delico.com>,
        Peter Hurley <peter@...leysoftware.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>
Cc:     Loic Poulain <loic.poulain@...el.com>, Pavel Machek <pavel@....cz>,
        NeilBrown <neil@...wn.name>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-bluetooth@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 7/9] serdev: Introduce new bus for serial attached
 devices

Hello,

Le 16/01/2017 à 23:54, Rob Herring a écrit :
> ---
> v2:
> - Add modalias sysfs attr and uevent hook
...
> +static int serdev_uevent(struct device *dev, struct kobj_uevent_env *env)
> +{
> +	/* TODO: ACPI and platform modalias */
> +	return of_device_uevent_modalias(dev, env);
> +}
...
> +static ssize_t modalias_show(struct device *dev,
> +			     struct device_attribute *attr, char *buf)
> +{
> +	ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
> +	buf[len] = '\n';
> +	buf[len+1] = 0;
> +	return len+1;
> +}

This prevents from building serdev as a module with following errors:
   ERROR: "of_device_uevent_modalias" [drivers/tty/serdev/serdev.ko] 
undefined!
   ERROR: "of_device_get_modalias" [drivers/tty/serdev/serdev.ko] undefined!

Currently, those symbols are not exported in drivers/of/device.c

Frédéric Danis