linux-kernel - Re: [PATCH 3/4] of/gpio: Implement GPIOLIB notifier hooks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 12 Mar 2010 13:07:23 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Anton Vorontsov <avorontsov@...mvista.com>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Bill Gatliff <bgat@...lgatliff.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] of/gpio: Implement GPIOLIB notifier hooks

On Fri, 5 Feb 2010 23:32:36 +0300
Anton Vorontsov <avorontsov@...mvista.com> wrote:

> This patch implements GPIOLIB notifier hooks, and thus makes device-enabled
> GPIO chips (i.e. the ones that have gpio_chip->dev specified) automatically
> attached to the OpenFirmware subsystem. Which means that now we can handle
> I2C and SPI GPIO chips almost* transparently.
> 
> ...
>
> +static int of_gpiochip_register_simple(struct gpio_chip *chip,
> +				       struct device_node *np)

Why is this called "register_simple" but the unregistration function
isn't called "unregister_simple"?

> +{
> +	struct of_gpio_chip *of_gc;
> +
> +	if (np->data) {
> +		WARN_ON(1);
> +		return -EBUSY;
> +	}
> +
> +	of_gc = kzalloc(sizeof(*of_gc), GFP_KERNEL);
> +	if (!of_gc)
> +		return -ENOMEM;
> +
> +	of_gc->gpio_cells = 2;
> +	of_gc->xlate = of_gpio_simple_xlate;
> +	of_gc->chip = chip;
> +	np->data = of_gc;
> +	of_node_get(np);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(of_gpiochip_register_simple);

Makes no sense to export a static symbol and to provide no declaration
of it in a .h file.  I assume the export was unintended.


My plot is somewhat lost.  Grant, could you please summarise in
easy-for-akpm-to-understand terms what your issues are with this
patchset and how you think we should proceed?

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/