linux-kernel - Re: tty, hvc, xen: leak? dead code? everything is fine?

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Message-ID: <alpine.DEB.2.00.1204131200330.15151@kaball-desktop>
Date:	Fri, 13 Apr 2012 12:05:14 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Samuel Thibault <samuel.thibault@...-lyon.org>
CC:	Jesper Juhl <jj@...osbits.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Gerd Hoffmann <kraxel@...e.de>,
	Alan Cox <alan@...ux.intel.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: tty, hvc, xen: leak? dead code? everything is fine?

On Thu, 12 Apr 2012, Samuel Thibault wrote:
> Jesper Juhl, le Thu 12 Apr 2012 23:33:20 +0200, a écrit :
> > Or *if* there's actually no way 'info->intfw' can actually be anything but 
> > NULL in this case,
> 
> There is no way that it's both non-NULL and the if was entered above: if
> the if was entered, the content of info is zeroes (kzalloc).
 
Yep. Thanks Samuel for the quick answer.
 
In more details: if the console has already been configured info->intf
is not NULL.
On the other hand if the console hasn't been configured yet info->intf
is NULL.

If the console has just been allocated by the kzalloc then obviously
it hasn't been configured and in fact info->intf is NULL.