drm: convert drm context code to use Linux idr

This converts the drm context allocator to an idr, using the new idr
interface features from Kristian.

Fixes from Kristian Hoegsberg <krh@redhat.com>

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 1277693e9ca4..b1cafe36611e 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -75,6 +75,8 @@
 #include <asm/pgalloc.h>
 #include "drm.h"
 
+#include <linux/idr.h>
+
 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
 #define __OS_HAS_MTRR (defined(CONFIG_MTRR))
 
@@ -676,8 +678,7 @@ struct drm_device {
         int ctx_count;                  /**< Number of context handles */
         struct mutex ctxlist_mutex;     /**< For ctxlist */
 
-        struct drm_map **context_sareas;            /**< per-context SAREA's */
-        int max_context;
+        struct idr ctx_idr;
 
         struct list_head vmalist;       /**< List of vmas (for debugging) */
         struct drm_lock_data lock;      /**< Information on hardware lock */