[PATCH] drm/doc: Add a warning to drm_dev_is_unplugged

[Noralf Trønnes]

Den 29.01.2019 09.56, skrev Daniel Vetter:
> It's probably not what you want, definitely not after Noralf's work to
> add drm_dev_enter/exit.
> 
> Cc: Noralf Trønnes <noralf at tronnes.org>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> ---

Reviewed-by: Noralf Trønnes <noralf at tronnes.org>

>  include/drm/drm_drv.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
> index 9a688cf12881..ca46a45a9cce 100644
> --- a/include/drm/drm_drv.h
> +++ b/include/drm/drm_drv.h
> @@ -740,6 +740,10 @@ void drm_dev_unplug(struct drm_device *dev);
>   * Unplugging itself is singalled through drm_dev_unplug(). If a device is
>   * unplugged, these two functions guarantee that any store before calling
>   * drm_dev_unplug() is visible to callers of this function after it completes
> + *
> + * WARNING: This function fundamentally races against drm_dev_unplug(). It is
> + * recommended that drivers instead use the underlying drm_dev_enter() and
> + * drm_dev_exit() function pairs.
>   */
>  static inline bool drm_dev_is_unplugged(struct drm_device *dev)
>  {
>