drm/i915: Use i915_global_register()

Rather than manually add every new global into each hook, use
i915_global_register() function and keep a list of registered globals to
invoke instead.

However, I haven't found a way for random drivers to add an .init table
to avoid having to manually add ourselves to i915_globals_init() each
time.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190305213830.18094-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

1 files changed, 18 insertions, 10 deletions

diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
index d9f6471ac16c..863ae12707ba 100644
--- a/drivers/gpu/drm/i915/i915_active.c
+++ b/drivers/gpu/drm/i915/i915_active.c
@@ -6,6 +6,7 @@
 
 #include "i915_drv.h"
 #include "i915_active.h"
+#include "i915_globals.h"
 
 #define BKL(ref) (&(ref)->i915->drm.struct_mutex)
 
@@ -17,6 +18,7 @@
  * nodes from a local slab cache to hopefully reduce the fragmentation.
  */
 static struct i915_global_active {
+	struct i915_global base;
 	struct kmem_cache *slab_cache;
 } global;
 
@@ -285,21 +287,27 @@ void i915_active_retire_noop(struct i915_active_request *active,
 #include "selftests/i915_active.c"
 #endif
 
-int __init i915_global_active_init(void)
+static void i915_global_active_shrink(void)
 {
-	global.slab_cache = KMEM_CACHE(active_node, SLAB_HWCACHE_ALIGN);
-	if (!global.slab_cache)
-		return -ENOMEM;
-
-	return 0;
+	kmem_cache_shrink(global.slab_cache);
 }
 
-void i915_global_active_shrink(void)
+static void i915_global_active_exit(void)
 {
-	kmem_cache_shrink(global.slab_cache);
+	kmem_cache_destroy(global.slab_cache);
 }
 
-void i915_global_active_exit(void)
+static struct i915_global_active global = { {
+	.shrink = i915_global_active_shrink,
+	.exit = i915_global_active_exit,
+} };
+
+int __init i915_global_active_init(void)
 {
-	kmem_cache_destroy(global.slab_cache);
+	global.slab_cache = KMEM_CACHE(active_node, SLAB_HWCACHE_ALIGN);
+	if (!global.slab_cache)
+		return -ENOMEM;
+
+	i915_global_register(&global.base);
+	return 0;
 }