[PATCH 07/10] drm: Kill ctx_count from struct drm_device

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

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 at linux.intel.com>
---
 drivers/gpu/drm/drm_context.c | 2 --
 drivers/gpu/drm/drm_fops.c    | 1 -
 drivers/gpu/drm/via/via_mm.c  | 2 +-
 include/drm/drmP.h            | 1 -
 4 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 224ff96..a4b017b 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 3f84277..529cf30 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -454,7 +454,6 @@ 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 7e3ad87..9278891 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 c2c577b..b6ceaaa 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1138,7 +1138,6 @@ 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;
-- 
1.8.1.5