[Linaro-mm-sig] [PATCH] dma-buf: Add debugfs support

[Francesco Lavra]

Hi,

On 12/14/2012 10:36 AM, sumit.semwal at ti.com wrote:
> From: Sumit Semwal <sumit.semwal at linaro.org>
> 
> Add debugfs support to make it easier to print debug information
> about the dma-buf buffers.
> 
> Signed-off-by: Sumit Semwal <sumit.semwal at ti.com>
> ---
>  drivers/base/dma-buf.c  |  149 +++++++++++++++++++++++++++++++++++++++++++++++
>  include/linux/dma-buf.h |    6 +-
>  2 files changed, 154 insertions(+), 1 deletion(-)
[...]
> diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
> index bd2e52c..160453f 100644
> --- a/include/linux/dma-buf.h
> +++ b/include/linux/dma-buf.h
> @@ -112,6 +112,7 @@ struct dma_buf_ops {
>   * @file: file pointer used for sharing buffers across, and for refcounting.
>   * @attachments: list of dma_buf_attachment that denotes all devices attached.
>   * @ops: dma_buf_ops associated with this buffer object.
> + * @list_node: node for dma_buf accounting and debugging.
>   * @priv: exporter specific private data for this buffer object.
>   */
>  struct dma_buf {
> @@ -121,6 +122,8 @@ struct dma_buf {
>  	const struct dma_buf_ops *ops;
>  	/* mutex to serialize list manipulation and attach/detach */
>  	struct mutex lock;
> +
> +	struct list_head list_node;
>  	void *priv;
>  };
>  
> @@ -183,5 +186,6 @@ int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
>  		 unsigned long);
>  void *dma_buf_vmap(struct dma_buf *);
>  void dma_buf_vunmap(struct dma_buf *, void *vaddr);
> -
> +int dma_buf_debugfs_create_file(const char *name,
> +				int (*write)(struct seq_file *));

Why is this function declared in the public header file?

--
Francesco