linux-kernel - Re: ping [PATCH v3] WAN: Adding support for Lantiq PEF2256 E1 chipset (FALC56)

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Date:	Sun, 19 Jan 2014 22:22:22 -0800
From:	Joe Perches <joe@...ches.com>
To:	Rob Landley <rob@...dley.net>
Cc:	Christophe Leroy <christophe.leroy@....fr>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Krzysztof Halasa <khc@...waw.pl>, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, marc.balemboy@....fr
Subject: Re: ping [PATCH v3] WAN: Adding support for Lantiq PEF2256 E1
 chipset (FALC56)

On Sun, 2014-01-19 at 18:50 -0600, Rob Landley wrote:
> On 01/19/14 13:34, Joe Perches wrote:
> > On Sun, 2014-01-19 at 19:07 +0100, Christophe Leroy wrote:
> >> Pinging this watch as we got no feedback since 22 Nov, although we have taken
> >> into account reviews from v1 and v2.
> >>
> >> The patch adds WAN support for Lantiq FALC56 - PEF2256 E1 Chipset.
> ...
> >> +static ssize_t fs_attr_Tx_TS_store(struct device *dev,
> >> +			struct device_attribute *attr,  const char *buf,
> >> +			size_t count)
> >> +{
> >> +	struct net_device *ndev = dev_get_drvdata(dev);
> >> +	struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
> >> +	unsigned long value;
> >> +	int ret = kstrtoul(buf, 16, (long int *)&value);
> >
> > unportable cast

> How is that not portable? It's long == pointer on Linux, which supports 
> LP64 on all targets. (As do BSD, MacOSX, android, and iOS.)

Sorry, I read it wrong.
long int is the same size as long and is fine.
I thought it was just int.

Still, declaring
	unsigned long foo;
and using
	(long int *)&foo;

is mixing implicit and explicit styles and perhaps
should be avoided.

> Do you mean it's not portable to Windows?
>    http://blogs.msdn.com/oldnewthing/archive/2005/01/31/363790.aspx

I hardly remember that stuff anymore.

cheers, Joe

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