Dean,
Looks like it works fine.
Any chance of getting this into 2.6.18 I wonder?
Steve.
On Wed, 2006-09-27 at 14:51 -0500, Dean Nelson wrote:
> Modules using the genpool allocator need to be able to destroy the data
> structure when unloading.
>
> Signed-off-by: Steve Wise <[email protected]>
> Signed-off-by: Dean Nelson <[email protected]>
>
> ---
>
> Hi Steve,
>
> I agree that the ability to destroy the allocated structures is
> necessary. Thanks for doing the work. I do think it appropriate
> to ensure that there are no outstanding allocations (to avoid use
> after free issues) and have added that check in this new patch.
> This patch has not been tested, though it does compile. I don't
> have the time today. I hope you don't mind testing it? :-)
>
> It also looks like I need to straighten out the kernel-doc
> aspects of this file. I'll tackle that as a separate patch.
>
> Thanks,
> Dean
>
>
> include/linux/genalloc.h | 1 +
> lib/genalloc.c | 29 +++++++++++++++++++++++++++++
> 2 files changed, 30 insertions(+)
>
>
> Index: linux-2.6/lib/genalloc.c
> ===================================================================
> --- linux-2.6.orig/lib/genalloc.c 2006-09-27 13:42:35.000000000 -0500
> +++ linux-2.6/lib/genalloc.c 2006-09-27 14:31:56.816523882 -0500
> @@ -71,6 +71,35 @@
>
>
> /*
> + * Destroy a memory pool.
> + *
> + * @pool: pool to destroy
> + */
> +void gen_pool_destroy(struct gen_pool *pool)
> +{
> + struct list_head *_chunk, *_next_chunk;
> + struct gen_pool_chunk *chunk;
> + int order = pool->min_alloc_order;
> + int bit, end_bit;
> +
> +
> + write_lock(&pool->lock);
> + list_for_each_safe(_chunk, _next_chunk, &pool->chunks) {
> + chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
> +
> + end_bit = (chunk->end_addr - chunk->start_addr) >> order;
> + bit = find_next_bit(chunk->bits, end_bit, 0);
> + BUG_ON(bit < end_bit);
> +
> + kfree(chunk);
> + }
> + kfree(pool);
> + return;
> +}
> +EXPORT_SYMBOL(gen_pool_destroy);
> +
> +
> +/*
> * Allocate the requested number of bytes from the specified pool.
> * Uses a first-fit algorithm.
> *
> Index: linux-2.6/include/linux/genalloc.h
> ===================================================================
> --- linux-2.6.orig/include/linux/genalloc.h 2006-09-27 13:42:34.000000000 -0500
> +++ linux-2.6/include/linux/genalloc.h 2006-09-27 14:18:31.807816652 -0500
> @@ -31,5 +31,6 @@
>
> extern struct gen_pool *gen_pool_create(int, int);
> extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
> +extern void gen_pool_destroy(struct gen_pool *);
> extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
> extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
