3 files changed, 32 insertions, 11 deletions

diff --git a/drivers/gpu/drm/i915/i915_buddy.c b/drivers/gpu/drm/i915/i915_buddy.c
index 29dd7d0310c1..caabcaea3be7 100644
--- a/drivers/gpu/drm/i915/i915_buddy.c
+++ b/drivers/gpu/drm/i915/i915_buddy.c
@@ -8,8 +8,14 @@
 #include "i915_buddy.h"
 
 #include "i915_gem.h"
+#include "i915_globals.h"
 #include "i915_utils.h"
 
+static struct i915_global_buddy {
+	struct i915_global base;
+	struct kmem_cache *slab_blocks;
+} global;
+
 static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_mm *mm,
 						 struct i915_buddy_block *parent,
 						 unsigned int order,
@@ -19,7 +25,7 @@ static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_mm *mm,
 
 	GEM_BUG_ON(order > I915_BUDDY_MAX_ORDER);
 
-	block = kmem_cache_zalloc(mm->slab_blocks, GFP_KERNEL);
+	block = kmem_cache_zalloc(global.slab_blocks, GFP_KERNEL);
 	if (!block)
 		return NULL;
 
@@ -34,7 +40,7 @@ static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_mm *mm,
 static void i915_block_free(struct i915_buddy_mm *mm,
 			    struct i915_buddy_block *block)
 {
-	kmem_cache_free(mm->slab_blocks, block);
+	kmem_cache_free(global.slab_blocks, block);
 }
 
 static void mark_allocated(struct i915_buddy_block *block)
@@ -85,15 +91,11 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
 
 	GEM_BUG_ON(mm->max_order > I915_BUDDY_MAX_ORDER);
 
-	mm->slab_blocks = KMEM_CACHE(i915_buddy_block, SLAB_HWCACHE_ALIGN);
-	if (!mm->slab_blocks)
-		return -ENOMEM;
-
 	mm->free_list = kmalloc_array(mm->max_order + 1,
 				      sizeof(struct list_head),
 				      GFP_KERNEL);
 	if (!mm->free_list)
-		goto out_destroy_slab;
+		return -ENOMEM;
 
 	for (i = 0; i <= mm->max_order; ++i)
 		INIT_LIST_HEAD(&mm->free_list[i]);
@@ -145,8 +147,6 @@ out_free_roots:
 	kfree(mm->roots);
 out_free_list:
 	kfree(mm->free_list);
-out_destroy_slab:
-	kmem_cache_destroy(mm->slab_blocks);
 	return -ENOMEM;
 }
 
@@ -161,7 +161,6 @@ void i915_buddy_fini(struct i915_buddy_mm *mm)
 
 	kfree(mm->roots);
 	kfree(mm->free_list);
-	kmem_cache_destroy(mm->slab_blocks);
 }
 
 static int split_block(struct i915_buddy_mm *mm,
@@ -410,3 +409,22 @@ err_free:
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftests/i915_buddy.c"
 #endif
+
+static void i915_global_buddy_exit(void)
+{
+	kmem_cache_destroy(global.slab_blocks);
+}
+
+static struct i915_global_buddy global = { {
+	.exit = i915_global_buddy_exit,
+} };
+
+int __init i915_global_buddy_init(void)
+{
+	global.slab_blocks = KMEM_CACHE(i915_buddy_block, 0);
+	if (!global.slab_blocks)
+		return -ENOMEM;
+
+	i915_global_register(&global.base);
+	return 0;
+}
diff --git a/drivers/gpu/drm/i915/i915_buddy.h b/drivers/gpu/drm/i915/i915_buddy.h
index 37f8c42071d1..d8f26706de52 100644
--- a/drivers/gpu/drm/i915/i915_buddy.h
+++ b/drivers/gpu/drm/i915/i915_buddy.h
@@ -47,7 +47,6 @@ struct i915_buddy_block {
  * i915_buddy_alloc* and i915_buddy_free* should suffice.
  */
 struct i915_buddy_mm {
-	struct kmem_cache *slab_blocks;
 	/* Maintain a free list for each order. */
 	struct list_head *free_list;
 
@@ -130,4 +129,6 @@ void i915_buddy_free(struct i915_buddy_mm *mm, struct i915_buddy_block *block);
 
 void i915_buddy_free_list(struct i915_buddy_mm *mm, struct list_head *objects);
 
+int i915_global_buddy_init(void);
+
 #endif
diff --git a/drivers/gpu/drm/i915/i915_globals.c b/drivers/gpu/drm/i915/i915_globals.c
index 0a1b8920a3ba..91198f5b0a06 100644
--- a/drivers/gpu/drm/i915/i915_globals.c
+++ b/drivers/gpu/drm/i915/i915_globals.c
@@ -8,6 +8,7 @@
 #include <linux/workqueue.h>
 
 #include "i915_active.h"
+#include "i915_buddy.h"
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_object.h"
 #include "i915_globals.h"
@@ -34,6 +35,7 @@ static void __i915_globals_cleanup(void)
 
 static __initconst int (* const initfn[])(void) = {
 	i915_global_active_init,
+	i915_global_buddy_init,
 	i915_global_context_init,
 	i915_global_gem_context_init,
 	i915_global_objects_init,