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SubjectRe: [PATCH 1/1] MM/ZBUD: make size unsigned like unique callsite
On Wed, Apr 30, 2014 at 09:18:36PM +0200, Fabian Frederick wrote:
> zbud_alloc is only called by zswap_frontswap_store with unsigned int len.
> Change function parameter + update >= 0 check.

Thanks for the cleanup!

Acked-by: Seth Jennings <sjennings@variantweb.net>

>
> Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: Fabian Frederick <fabf@skynet.be>
> ---
> include/linux/zbud.h | 2 +-
> mm/zbud.c | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/zbud.h b/include/linux/zbud.h
> index 2571a5c..13af0d4 100644
> --- a/include/linux/zbud.h
> +++ b/include/linux/zbud.h
> @@ -11,7 +11,7 @@ struct zbud_ops {
>
> struct zbud_pool *zbud_create_pool(gfp_t gfp, struct zbud_ops *ops);
> void zbud_destroy_pool(struct zbud_pool *pool);
> -int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp,
> +int zbud_alloc(struct zbud_pool *pool, unsigned int size, gfp_t gfp,
> unsigned long *handle);
> void zbud_free(struct zbud_pool *pool, unsigned long handle);
> int zbud_reclaim_page(struct zbud_pool *pool, unsigned int retries);
> diff --git a/mm/zbud.c b/mm/zbud.c
> index 9451361..01df13a 100644
> --- a/mm/zbud.c
> +++ b/mm/zbud.c
> @@ -247,7 +247,7 @@ void zbud_destroy_pool(struct zbud_pool *pool)
> * gfp arguments are invalid or -ENOMEM if the pool was unable to allocate
> * a new page.
> */
> -int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp,
> +int zbud_alloc(struct zbud_pool *pool, unsigned int size, gfp_t gfp,
> unsigned long *handle)
> {
> int chunks, i, freechunks;
> @@ -255,7 +255,7 @@ int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp,
> enum buddy bud;
> struct page *page;
>
> - if (size <= 0 || gfp & __GFP_HIGHMEM)
> + if (!size || (gfp & __GFP_HIGHMEM))
> return -EINVAL;
> if (size > PAGE_SIZE - ZHDR_SIZE_ALIGNED - CHUNK_SIZE)
> return -ENOSPC;
> --
> 1.9.1
>


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