Re: [PATCH 2.6.11] aoe [5/12]: don't try to free null bufpool

From: Arjan van de Ven
Date: Thu Mar 24 2005 - 12:18:29 EST


On Thu, 2005-03-24 at 09:04 -0800, ecashin@xxxxxxxxxxxx wrote:
> Arjan van de Ven <arjan@xxxxxxxxxxxxx> writes:
>
> > On Thu, 2005-03-24 at 07:17 -0800, ecashin@xxxxxxxxxxxx wrote:
> >> don't try to free null bufpool
> >
> > in linux there is a "rule" that all memory free routines are supposed to
> > also accept NULL as argument, so I think this patch is not needed (and
> > even wrong)
> >
>
> Hmm. The mm/mempool.c:mempool_destroy function immediately
> dereferences the pointer passed to it:
>
> void mempool_destroy(mempool_t *pool)
> {
> if (pool->curr_nr != pool->min_nr)
> BUG(); /* There were outstanding elements */
> free_pool(pool);
> }
>
> ... so I'm not sure mempool_destroy fits the rule. Are you suggesting
> that the patch should instead modify mempool_destroy?

hmm perhaps... Jens?

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