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* [PATCH -next] tee: optee: fix type warning of sizeof in pool_op_alloc()
@ 2020-09-17  8:13 Liu Shixin
  2020-09-24  7:33 ` Jens Wiklander
  0 siblings, 1 reply; 2+ messages in thread
From: Liu Shixin @ 2020-09-17  8:13 UTC (permalink / raw)
  To: Jens Wiklander; +Cc: op-tee, linux-kernel, Liu Shixin

sizeof() when applied to a pointer typed expression should gives the
size of the pointed data, even if the data is a pointer.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
---
 drivers/tee/optee/shm_pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
index d767eebf30bd..9fdc667b5df0 100644
--- a/drivers/tee/optee/shm_pool.c
+++ b/drivers/tee/optee/shm_pool.c
@@ -31,7 +31,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
 		unsigned int nr_pages = 1 << order, i;
 		struct page **pages;
 
-		pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL);
+		pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
 		if (!pages)
 			return -ENOMEM;
 
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH -next] tee: optee: fix type warning of sizeof in pool_op_alloc()
  2020-09-17  8:13 [PATCH -next] tee: optee: fix type warning of sizeof in pool_op_alloc() Liu Shixin
@ 2020-09-24  7:33 ` Jens Wiklander
  0 siblings, 0 replies; 2+ messages in thread
From: Jens Wiklander @ 2020-09-24  7:33 UTC (permalink / raw)
  To: Liu Shixin; +Cc: op-tee, Linux Kernel Mailing List

On Thu, Sep 17, 2020 at 9:52 AM Liu Shixin <liushixin2@huawei.com> wrote:
>
> sizeof() when applied to a pointer typed expression should gives the
> size of the pointed data, even if the data is a pointer.
>
> Signed-off-by: Liu Shixin <liushixin2@huawei.com>
> ---
>  drivers/tee/optee/shm_pool.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
> index d767eebf30bd..9fdc667b5df0 100644
> --- a/drivers/tee/optee/shm_pool.c
> +++ b/drivers/tee/optee/shm_pool.c
> @@ -31,7 +31,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
>                 unsigned int nr_pages = 1 << order, i;
>                 struct page **pages;
>
> -               pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL);
> +               pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);

In this case we want an array of pointers as you also can see in the
type of "pages".

Thanks,
Jens

>                 if (!pages)
>                         return -ENOMEM;
>
> --
> 2.25.1
>

^ permalink raw reply	[flat|nested] 2+ messages in thread

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