drm: Kill ctx_count from struct drm_device

The only user of ctx_count is the via driver, and we can replace that
use with list_is_singular().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

4 files changed, 1 insertions, 5 deletions

diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 224ff965bcf7..a4b017b6849e 100644
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -334,7 +334,6 @@ int drm_addctx(struct drm_device *dev, void *data,
 
         mutex_lock(&dev->ctxlist_mutex);
         list_add(&ctx_entry->head, &dev->ctxlist);
-        ++dev->ctx_count;
         mutex_unlock(&dev->ctxlist_mutex);
 
         return 0;
@@ -432,7 +431,6 @@ int drm_rmctx(struct drm_device *dev, void *data,
                         if (pos->handle == ctx->handle) {
                                 list_del(&pos->head);
                                 kfree(pos);
-                                --dev->ctx_count;
                         }
                 }
         }
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 8bc94eaaf9f5..621b45e08bd1 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -524,7 +524,6 @@ int drm_release(struct inode *inode, struct file *filp)
 
                                 list_del(&pos->head);
                                 kfree(pos);
-                                --dev->ctx_count;
                         }
                 }
         }
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index 7e3ad87c366c..927889105483 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -79,7 +79,7 @@ int via_final_context(struct drm_device *dev, int context)
 
         /* Linux specific until context tracking code gets ported to BSD */
         /* Last context, perform cleanup */
-        if (dev->ctx_count == 1 && dev->dev_private) {
+        if (list_is_singular(&dev->ctxlist) && dev->dev_private) {
                 DRM_DEBUG("Last Context\n");
                 drm_irq_uninstall(dev);
                 via_cleanup_futex(dev_priv);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 5b99c0e072ef..e26b80236719 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1132,7 +1132,6 @@ struct drm_device {
         /** \name Context handle management */
         /*@{ */
         struct list_head ctxlist;       /**< Linked list of context handles */
-        int ctx_count;                  /**< Number of context handles */
         struct mutex ctxlist_mutex;     /**< For ctxlist */
 
         struct idr ctx_idr;