[dm-devel] [PATCH 1/2] dm: add dm_table_device_name()

[Mike Snitzer]

On Tue, Oct 09 2018 at  3:36pm -0400,
Michał Mirosław <mirq-linux at rere.qmqm.pl> wrote:

> Add a shortcut for dm_device_name(dm_table_get_md(t)).
> 
> Signed-off-by: Michał Mirosław <mirq-linux at rere.qmqm.pl>
> ---
>  drivers/md/dm-table.c         | 6 ++++++
>  include/linux/device-mapper.h | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
> index 3d0e2c198f06..1f4ab9c8b9a8 100644
> --- a/drivers/md/dm-table.c
> +++ b/drivers/md/dm-table.c
> @@ -2079,6 +2079,12 @@ struct mapped_device *dm_table_get_md(struct dm_table *t)
>  }
>  EXPORT_SYMBOL(dm_table_get_md);
>  
> +const char *dm_table_device_name(struct dm_table *t)
> +{
> +	return dm_device_name(t->md);
> +}
> +EXPORT_SYMBOL(dm_table_device_name);
> +
>  void dm_table_run_md_queue_async(struct dm_table *t)
>  {
>  	struct mapped_device *md;

This needs to be EXPORT_SYMBOL_GPL

> diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
> index 6fb0808e87c8..0d63f7e5261c 100644
> --- a/include/linux/device-mapper.h
> +++ b/include/linux/device-mapper.h
> @@ -490,6 +490,7 @@ sector_t dm_table_get_size(struct dm_table *t);
>  unsigned int dm_table_get_num_targets(struct dm_table *t);
>  fmode_t dm_table_get_mode(struct dm_table *t);
>  struct mapped_device *dm_table_get_md(struct dm_table *t);
> +const char *dm_table_device_name(struct dm_table *t);
>  
>  /*
>   * Trigger an event.
> -- 
> 2.19.1
>