On 3/6/06, David S. Miller <[email protected]> wrote:
> From: Dave Jones <[email protected]>
> Date: Mon, 6 Mar 2006 02:04:58 -0500
>
> > (I wish we had a kfree variant that NULL'd the target when it was free'd)
>
> Excellent idea.
> -
Slab debugging should catch double frees, but it will not attract your
attention till you see your dmesg log. kfree() will ignore NULL
pointer, from the comments in kfree
/**
* kfree - free previously allocated memory
* @objp: pointer returned by kmalloc.
*
* If @objp is NULL, no operation is performed.
<snip>
May we could have such a variant under CONFIG_DEBUG_SLAB if we needed
and also change the variant kfree to BUG_ON() a NULL pointer.
Balbir
-
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