[PATCH] drm: atomic helper: fix W=1 warnings

[Benjamin Gaignard]

Le lun. 9 sept. 2019 à 16:41, Benjamin Gaignard
<benjamin.gaignard at st.com> a écrit :
>
> Fix warnings with W=1.
> Few for_each macro set variables that are never used later.
> Prevent warning by marking these variables as __maybe_unused.
>

A little up on this one because it may exist others ways to fix these warnings.
Get feedback on this path could give the direction for similar ones in drm.

Thanks,
Benjamin

> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at st.com>
> ---
>  drivers/gpu/drm/drm_atomic_helper.c | 36 ++++++++++++++++++------------------
>  1 file changed, 18 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index aa16ea17ff9b..b69d17b0b9bd 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -262,7 +262,7 @@ steal_encoder(struct drm_atomic_state *state,
>               struct drm_encoder *encoder)
>  {
>         struct drm_crtc_state *crtc_state;
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *old_connector_state, *new_connector_state;
>         int i;
>
> @@ -412,7 +412,7 @@ mode_fixup(struct drm_atomic_state *state)
>  {
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *new_crtc_state;
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *new_conn_state;
>         int i;
>         int ret;
> @@ -608,7 +608,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
>  {
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *old_connector_state, *new_connector_state;
>         int i, ret;
>         unsigned connectors_mask = 0;
> @@ -984,7 +984,7 @@ crtc_needs_disable(struct drm_crtc_state *old_state,
>  static void
>  disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
>  {
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *old_conn_state, *new_conn_state;
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> @@ -1173,7 +1173,7 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
>  {
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *new_crtc_state;
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *new_conn_state;
>         int i;
>
> @@ -1294,7 +1294,7 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *old_crtc_state;
>         struct drm_crtc_state *new_crtc_state;
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *new_conn_state;
>         int i;
>
> @@ -1384,7 +1384,7 @@ int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
>                                       struct drm_atomic_state *state,
>                                       bool pre_swap)
>  {
> -       struct drm_plane *plane;
> +       struct drm_plane __maybe_unused *plane;
>         struct drm_plane_state *new_plane_state;
>         int i, ret;
>
> @@ -1431,7 +1431,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
>                 struct drm_atomic_state *old_state)
>  {
>         struct drm_crtc *crtc;
> -       struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> +       struct drm_crtc_state __maybe_unused *old_crtc_state, *new_crtc_state;
>         int i, ret;
>         unsigned crtc_mask = 0;
>
> @@ -1621,7 +1621,7 @@ static void commit_work(struct work_struct *work)
>  int drm_atomic_helper_async_check(struct drm_device *dev,
>                                    struct drm_atomic_state *state)
>  {
> -       struct drm_crtc *crtc;
> +       struct drm_crtc __maybe_unused *crtc;
>         struct drm_crtc_state *crtc_state;
>         struct drm_plane *plane = NULL;
>         struct drm_plane_state *old_plane_state = NULL;
> @@ -1982,9 +1982,9 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
>  {
>         struct drm_crtc *crtc;
>         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
> -       struct drm_connector *conn;
> +       struct drm_connector __maybe_unused *conn;
>         struct drm_connector_state *old_conn_state, *new_conn_state;
> -       struct drm_plane *plane;
> +       struct drm_plane __maybe_unused *plane;
>         struct drm_plane_state *old_plane_state, *new_plane_state;
>         struct drm_crtc_commit *commit;
>         int i, ret;
> @@ -2214,7 +2214,7 @@ EXPORT_SYMBOL(drm_atomic_helper_fake_vblank);
>   */
>  void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state)
>  {
> -       struct drm_crtc *crtc;
> +       struct drm_crtc __maybe_unused *crtc;
>         struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>         struct drm_crtc_commit *commit;
>         int i;
> @@ -2300,7 +2300,7 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done);
>  int drm_atomic_helper_prepare_planes(struct drm_device *dev,
>                                      struct drm_atomic_state *state)
>  {
> -       struct drm_connector *connector;
> +       struct drm_connector __maybe_unused *connector;
>         struct drm_connector_state *new_conn_state;
>         struct drm_plane *plane;
>         struct drm_plane_state *new_plane_state;
> @@ -2953,9 +2953,9 @@ int drm_atomic_helper_disable_all(struct drm_device *dev,
>  {
>         struct drm_atomic_state *state;
>         struct drm_connector_state *conn_state;
> -       struct drm_connector *conn;
> +       struct drm_connector __maybe_unused *conn;
>         struct drm_plane_state *plane_state;
> -       struct drm_plane *plane;
> +       struct drm_plane __maybe_unused *plane;
>         struct drm_crtc_state *crtc_state;
>         struct drm_crtc *crtc;
>         int ret, i;
> @@ -3199,11 +3199,11 @@ int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
>  {
>         int i, ret;
>         struct drm_plane *plane;
> -       struct drm_plane_state *new_plane_state;
> +       struct drm_plane_state __maybe_unused *new_plane_state;
>         struct drm_connector *connector;
> -       struct drm_connector_state *new_conn_state;
> +       struct drm_connector_state __maybe_unused *new_conn_state;
>         struct drm_crtc *crtc;
> -       struct drm_crtc_state *new_crtc_state;
> +       struct drm_crtc_state __maybe_unused *new_crtc_state;
>
>         state->acquire_ctx = ctx;
>
> --
> 2.15.0
>