Re: p = kmalloc(sizeof(*p), )

[Al Viro <viro@ftp.linux.org.uk>]

On Sun, Sep 18, 2005 at 10:30:26PM +0100, Alan Cox wrote:
> > It would be very useful when e.g. tracking down improper uses of
> > struct file, struct dentry, etc. - stuff that should always be
> > allocated by one helper function.  Same goes for e.g. net_device -
> 
> Another useful trick here btw is to make such objects contain (when
> debugging)
> 
> 	void *magic_ptr;
> 
> which is initialised as foo->magic_ptr = foo;
> 
> That catches anyone copying them and tells you what got copied

At runtime, _if_ we do not forget to initialize it.  Which is what
we are trying to catch...
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