From: Luke-Jr <luke@dashjr.org>
To: "Pekka Enberg" <penberg@cs.helsinki.fi>
Subject: Re: 9pfs double kfree
Date: Thu, 9 Mar 2006 14:48:11 +0000
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Cc: "Dave Jones" <davej@redhat.com>, "Al Viro" <viro@ftp.linux.org.uk>,
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       ericvh@gmail.com, rminnich@lanl.gov
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On Monday 06 March 2006 07:56, Pekka Enberg wrote:
> On 3/6/06, Dave Jones <davej@redhat.com> wrote:
> > I wonder if we could get away with something as simple as..
> >
> > #define kfree(foo) \
> >         __kfree(foo); \
> >         foo = KFREE_POISON;
> >
> > ?
>
> It's legal to call kfree() twice for NULL pointer. The above poisons
> foo unconditionally which makes that case break I think.

#define kfree(foo) foo = __kfree(foo);

Assuming the current kfree doesn't return something...
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