linux-kernel - Re: [PATCH 2.6.18 ] LIB Add gen_pool

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Date:	Wed, 27 Sep 2006 08:51:23 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Steve Wise <swise@...ngridcomputing.com>
Cc:	linux-kernel@...r.kernel.org, dcn@....com, jes@...ined-monkey.org,
	avolkov@...ma-el.com
Subject: Re: [PATCH 2.6.18 ] LIB Add gen_pool_destroy().

On Wed, 27 Sep 2006 10:35:45 -0500 Steve Wise wrote:

> Modules using the genpool allocator need to be able to destroy the data
> structure when unloading.
> 
> Signed-off-by: Steve Wise <swise@...ngridcomputing.com>
> ---
> 
>  include/linux/genalloc.h |    1 +
>  lib/genalloc.c           |   22 ++++++++++++++++++++++
>  2 files changed, 23 insertions(+), 0 deletions(-)
> 
> diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h
> index 690c428..ca2b119 100644
> --- a/include/linux/genalloc.h
> +++ b/include/linux/genalloc.h
> @@ -30,6 +30,7 @@ struct gen_pool_chunk {
>  };
>  
>  extern struct gen_pool *gen_pool_create(int, int);
> +extern void gen_pool_destroy(struct gen_pool *);
>  extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
>  extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
>  extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
> diff --git a/lib/genalloc.c b/lib/genalloc.c
> index 71338b4..c8afa10 100644
> --- a/lib/genalloc.c
> +++ b/lib/genalloc.c
> @@ -36,6 +36,28 @@ EXPORT_SYMBOL(gen_pool_create);
>  
>  
>  /*
> + * Destroy a memory pool.  Assumes the user deals with releasing the
> + * actual memory managed by the pool.  
> + *
> + * @pool: pool to destroy.
> + *
> + */

Please use kernel-doc for exported kernel interfaces.
See Documentation/kernel-doc-nano-HOWTO.txt for info,
and/or see some file like kernel/printk.c for examples.

> +void gen_pool_destroy(struct gen_pool *pool)
> +{
> +	struct list_head *_chunk, *next;
> +	struct gen_pool_chunk *chunk;
> +
> +	list_for_each_safe(_chunk, next, &pool->chunks) {
> +		chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
> +		kfree(chunk);
> +	}
> +	kfree(pool);
> +	return;
> +}
> +EXPORT_SYMBOL(gen_pool_destroy);
> +
> +
> +/*
>   * Add a new chunk of memory to the specified pool.
>   *
>   * @pool: pool to add new memory chunk to
> -

argh.  more.  (not part of your patch)

---
~Randy
-
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