Re: [PATCH 3/3] drm/ttm: remove pointers to globals

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On 9/25/19 12:55 PM, Christian König wrote:
As the name says global memory and bo accounting is global. So it doesn't
make to much sense having pointers to global structures all around the code.

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c |  2 +-
  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c   |  9 ++--
  drivers/gpu/drm/drm_gem_vram_helper.c    |  5 +-
  drivers/gpu/drm/qxl/qxl_release.c        |  7 +--
  drivers/gpu/drm/qxl/qxl_ttm.c            |  7 +--
  drivers/gpu/drm/ttm/ttm_agp_backend.c    |  2 +-
  drivers/gpu/drm/ttm/ttm_bo.c             | 65 +++++++++++-------------
  drivers/gpu/drm/ttm/ttm_bo_util.c        |  2 +-
  drivers/gpu/drm/ttm/ttm_bo_vm.c          |  4 +-
  drivers/gpu/drm/ttm/ttm_execbuf_util.c   | 25 +++------
  drivers/gpu/drm/ttm/ttm_memory.c         |  2 +-
  drivers/gpu/drm/ttm/ttm_page_alloc.c     |  4 +-
  drivers/gpu/drm/ttm/ttm_page_alloc_dma.c |  4 +-
  include/drm/ttm/ttm_bo_driver.h          |  6 +--
  include/drm/ttm/ttm_memory.h             |  1 -
  15 files changed, 57 insertions(+), 88 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index d79ab1da9e07..c392f7672e06 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -71,7 +71,7 @@
   */
  static int amdgpu_gart_dummy_page_init(struct amdgpu_device *adev)
  {
-	struct page *dummy_page = adev->mman.bdev.glob->dummy_read_page;
+	struct page *dummy_page = ttm_bo_glob.dummy_read_page;
if (adev->dummy_page_addr)
  		return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f555843daef0..cca1887465a4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -600,21 +600,20 @@ void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo)
  void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
  				struct amdgpu_vm *vm)
  {
-	struct ttm_bo_global *glob = adev->mman.bdev.glob;
  	struct amdgpu_vm_bo_base *bo_base;
#if 0
  	if (vm->bulk_moveable) {
-		spin_lock(&glob->lru_lock);
+		spin_lock(&ttm_bo_glob.lru_lock);
  		ttm_bo_bulk_move_lru_tail(&vm->lru_bulk_move);
-		spin_unlock(&glob->lru_lock);
+		spin_unlock(&ttm_bo_glob.lru_lock);
  		return;
  	}
  #endif
memset(&vm->lru_bulk_move, 0, sizeof(vm->lru_bulk_move)); - spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	list_for_each_entry(bo_base, &vm->idle, vm_status) {
  		struct amdgpu_bo *bo = bo_base->bo;
@@ -626,7 +625,7 @@ void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
  			ttm_bo_move_to_lru_tail(&bo->shadow->tbo,
  						&vm->lru_bulk_move);
  	}
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
vm->bulk_moveable = true;
  }
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 49588de88959..3695168206b5 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -896,12 +896,11 @@ static int drm_vram_mm_debugfs(struct seq_file *m, void *data)
  	struct drm_info_node *node = (struct drm_info_node *) m->private;
  	struct drm_vram_mm *vmm = node->minor->dev->vram_mm;
  	struct drm_mm *mm = vmm->bdev.man[TTM_PL_VRAM].priv;
-	struct ttm_bo_global *glob = vmm->bdev.glob;
  	struct drm_printer p = drm_seq_file_printer(m);
- spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	drm_mm_print(mm, &p);
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	return 0;
  }
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 71f1b51a1350..a0d388b7b53b 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -429,7 +429,6 @@ void qxl_release_unmap(struct qxl_device *qdev,
  void qxl_release_fence_buffer_objects(struct qxl_release *release)
  {
  	struct ttm_buffer_object *bo;
-	struct ttm_bo_global *glob;
  	struct ttm_bo_device *bdev;
  	struct ttm_validate_buffer *entry;
  	struct qxl_device *qdev;
@@ -451,9 +450,7 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release)
  		       release->id | 0xf0000000, release->base.seqno);
  	trace_dma_fence_emit(&release->base);
- glob = bdev->glob;
-
-	spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
list_for_each_entry(entry, &release->bos, head) {
  		bo = entry->bo;
@@ -462,7 +459,7 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release)
  		ttm_bo_move_to_lru_tail(bo, NULL);
  		dma_resv_unlock(bo->base.resv);
  	}
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	dma_resv_ctx_fini(&release->ticket);
  }
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index cbc6c2ba8630..8d779ca2682a 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -369,14 +369,11 @@ static int qxl_mm_dump_table(struct seq_file *m, void *data)
  {
  	struct drm_info_node *node = (struct drm_info_node *)m->private;
  	struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
-	struct drm_device *dev = node->minor->dev;
-	struct qxl_device *rdev = dev->dev_private;
-	struct ttm_bo_global *glob = rdev->mman.bdev.glob;
  	struct drm_printer p = drm_seq_file_printer(m);
- spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	drm_mm_print(mm, &p);
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	return 0;
  }
  #endif
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index ea4d59eb8966..6050dc846894 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -51,7 +51,7 @@ struct ttm_agp_backend {
  static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
  {
  	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
-	struct page *dummy_read_page = ttm->bdev->glob->dummy_read_page;
+	struct page *dummy_read_page = ttm_bo_glob.dummy_read_page;
  	struct drm_mm_node *node = bo_mem->mm_node;
  	struct agp_memory *mem;
  	int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index ab9967b84e0b..57cb77811dd5 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -51,6 +51,7 @@ static void ttm_bo_global_kobj_release(struct kobject *kobj);
  DEFINE_MUTEX(ttm_global_mutex);
  unsigned ttm_bo_glob_use_count;
  struct ttm_bo_global ttm_bo_glob;
+EXPORT_SYMBOL(ttm_bo_glob);
static struct attribute ttm_bo_count = {
  	.name = "bo_count",
@@ -148,7 +149,6 @@ static void ttm_bo_release_list(struct kref *list_kref)
  {
  	struct ttm_buffer_object *bo =
  	    container_of(list_kref, struct ttm_buffer_object, list_kref);
-	struct ttm_bo_device *bdev = bo->bdev;
  	size_t acc_size = bo->acc_size;
BUG_ON(kref_read(&bo->list_kref));
@@ -158,13 +158,13 @@ static void ttm_bo_release_list(struct kref *list_kref)
  	BUG_ON(!list_empty(&bo->lru));
  	BUG_ON(!list_empty(&bo->ddestroy));
  	ttm_tt_destroy(bo->ttm);
-	atomic_dec(&bo->bdev->glob->bo_count);
+	atomic_dec(&ttm_bo_glob.bo_count);
  	dma_fence_put(bo->moving);
  	if (!ttm_bo_uses_embedded_gem_object(bo))
  		dma_resv_fini(&bo->base._resv);
  	mutex_destroy(&bo->wu_mutex);
  	bo->destroy(bo);
-	ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
+	ttm_mem_global_free(&ttm_mem_glob, acc_size);
  }
static void ttm_bo_add_mem_to_lru(struct ttm_buffer_object *bo,
@@ -187,7 +187,7 @@ static void ttm_bo_add_mem_to_lru(struct ttm_buffer_object *bo,
if (bo->ttm && !(bo->ttm->page_flags &
  			 (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) {
-		list_add_tail(&bo->swap, &bdev->glob->swap_lru[bo->priority]);
+		list_add_tail(&bo->swap, &ttm_bo_glob.swap_lru[bo->priority]);
  		kref_get(&bo->list_kref);
  	}
  }
@@ -294,7 +294,7 @@ void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
  		dma_resv_assert_held(pos->first->base.resv);
  		dma_resv_assert_held(pos->last->base.resv);
- lru = &pos->first->bdev->glob->swap_lru[i];
+		lru = &ttm_bo_glob.swap_lru[i];
  		list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap);
  	}
  }
@@ -458,7 +458,6 @@ static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
  static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
  {
  	struct ttm_bo_device *bdev = bo->bdev;
-	struct ttm_bo_global *glob = bdev->glob;
  	int ret;
ret = ttm_bo_individualize_resv(bo);
@@ -468,16 +467,16 @@ static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
  		 */
  		dma_resv_wait_timeout_rcu(bo->base.resv, true, false,
  						    30 * HZ);
-		spin_lock(&glob->lru_lock);
+		spin_lock(&ttm_bo_glob.lru_lock);
  		goto error;
  	}
- spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	ret = dma_resv_trylock(bo->base.resv) ? 0 : -EBUSY;
  	if (!ret) {
  		if (dma_resv_test_signaled_rcu(&bo->base._resv, true)) {
  			ttm_bo_del_from_lru(bo);
-			spin_unlock(&glob->lru_lock);
+			spin_unlock(&ttm_bo_glob.lru_lock);
  			if (bo->base.resv != &bo->base._resv)
  				dma_resv_unlock(&bo->base._resv);
@@ -506,7 +505,7 @@ static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
  error:
  	kref_get(&bo->list_kref);
  	list_add_tail(&bo->ddestroy, &bdev->ddestroy);
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
schedule_delayed_work(&bdev->wq,
  			      ((HZ / 100) < 1) ? 1 : HZ / 100);
@@ -529,7 +528,6 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
  			       bool interruptible, bool no_wait_gpu,
  			       bool unlock_resv)
  {
-	struct ttm_bo_global *glob = bo->bdev->glob;
  	struct dma_resv *resv;
  	int ret;
@@ -548,7 +546,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, if (unlock_resv)
  			dma_resv_unlock(bo->base.resv);
-		spin_unlock(&glob->lru_lock);
+		spin_unlock(&ttm_bo_glob.lru_lock);
lret = dma_resv_wait_timeout_rcu(resv, true,
  							   interruptible,
@@ -559,7 +557,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
  		else if (lret == 0)
  			return -EBUSY;
- spin_lock(&glob->lru_lock);
+		spin_lock(&ttm_bo_glob.lru_lock);
  		if (unlock_resv && !dma_resv_trylock(bo->base.resv)) {
  			/*
  			 * We raced, and lost, someone else holds the reservation now,
@@ -569,7 +567,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
  			 * delayed destruction would succeed, so just return success
  			 * here.
  			 */
-			spin_unlock(&glob->lru_lock);
+			spin_unlock(&ttm_bo_glob.lru_lock);
  			return 0;
  		}
  		ret = 0;
@@ -578,7 +576,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
  	if (ret || unlikely(list_empty(&bo->ddestroy))) {
  		if (unlock_resv)
  			dma_resv_unlock(bo->base.resv);
-		spin_unlock(&glob->lru_lock);
+		spin_unlock(&ttm_bo_glob.lru_lock);
  		return ret;
  	}
@@ -586,7 +584,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
  	list_del_init(&bo->ddestroy);
  	kref_put(&bo->list_kref, ttm_bo_ref_bug);
- spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	ttm_bo_cleanup_memtype_use(bo);
if (unlock_resv)
@@ -601,7 +599,7 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
   */
  static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
  {
-	struct ttm_bo_global *glob = bdev->glob;
+	struct ttm_bo_global *glob = &ttm_bo_glob;
  	struct list_head removed;
  	bool empty;
@@ -822,13 +820,12 @@ static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
  			       struct ww_acquire_ctx *ticket)
  {
  	struct ttm_buffer_object *bo = NULL, *busy_bo = NULL;
-	struct ttm_bo_global *glob = bdev->glob;
  	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
  	bool locked = false;
  	unsigned i;
  	int ret;
- spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
  		list_for_each_entry(bo, &man->lru[i], lru) {
  			bool busy;
@@ -860,7 +857,7 @@ static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
  	if (!bo) {
  		if (busy_bo)
  			kref_get(&busy_bo->list_kref);
-		spin_unlock(&glob->lru_lock);
+		spin_unlock(&ttm_bo_glob.lru_lock);
  		ret = ttm_mem_evict_wait_busy(busy_bo, ctx, ticket);
  		if (busy_bo)
  			kref_put(&busy_bo->list_kref, ttm_bo_release_list);
@@ -876,7 +873,7 @@ static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
  		return ret;
  	}
- spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
ret = ttm_bo_evict(bo, ctx);
  	if (locked)
@@ -1042,10 +1039,10 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
  	mem->mem_type = mem_type;
  	mem->placement = cur_flags;
- spin_lock(&bo->bdev->glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	ttm_bo_del_from_lru(bo);
  	ttm_bo_add_mem_to_lru(bo, mem);
-	spin_unlock(&bo->bdev->glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
return 0;
  }
@@ -1132,9 +1129,9 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
error:
  	if (bo->mem.mem_type == TTM_PL_SYSTEM && !list_empty(&bo->lru)) {
-		spin_lock(&bo->bdev->glob->lru_lock);
+		spin_lock(&ttm_bo_glob.lru_lock);
  		ttm_bo_move_to_lru_tail(bo, NULL);
-		spin_unlock(&bo->bdev->glob->lru_lock);
+		spin_unlock(&ttm_bo_glob.lru_lock);
  	}
return ret;
@@ -1258,9 +1255,9 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
  			 struct dma_resv *resv,
  			 void (*destroy) (struct ttm_buffer_object *))
  {
+	struct ttm_mem_global *mem_glob = &ttm_mem_glob;
  	int ret = 0;
  	unsigned long num_pages;
-	struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
  	bool locked;
ret = ttm_mem_global_alloc(mem_glob, acc_size, ctx);
@@ -1321,7 +1318,7 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
  		dma_resv_init(&bo->base._resv);
  		drm_vma_node_reset(&bo->base.vma_node);
  	}
-	atomic_inc(&bo->bdev->glob->bo_count);
+	atomic_inc(&ttm_bo_glob.bo_count);
/*
  	 * For ttm_bo_type_device buffers, allocate
@@ -1351,9 +1348,9 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
  		return ret;
  	}
- spin_lock(&bdev->glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	ttm_bo_move_to_lru_tail(bo, NULL);
-	spin_unlock(&bdev->glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
return ret;
  }
@@ -1451,7 +1448,7 @@ static int ttm_bo_force_list_clean(struct ttm_bo_device *bdev,
  		.flags = TTM_OPT_FLAG_FORCE_ALLOC
  	};
  	struct ttm_mem_type_manager *man = &bdev->man[mem_type];
-	struct ttm_bo_global *glob = bdev->glob;
+	struct ttm_bo_global *glob = &ttm_bo_glob;
  	struct dma_fence *fence;
  	int ret;
  	unsigned i;
@@ -1620,8 +1617,6 @@ static int ttm_bo_global_init(void)
  		goto out;
spin_lock_init(&glob->lru_lock);
-	glob->mem_glob = &ttm_mem_glob;
-	glob->mem_glob->bo_glob = glob;
  	glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
if (unlikely(glob->dummy_read_page == NULL)) {
@@ -1645,10 +1640,10 @@ static int ttm_bo_global_init(void)
int ttm_bo_device_release(struct ttm_bo_device *bdev)
  {
+	struct ttm_bo_global *glob = &ttm_bo_glob;
  	int ret = 0;
  	unsigned i = TTM_NUM_MEM_TYPES;
  	struct ttm_mem_type_manager *man;
-	struct ttm_bo_global *glob = bdev->glob;
while (i--) {
  		man = &bdev->man[i];
@@ -1717,7 +1712,6 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
  	INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
  	INIT_LIST_HEAD(&bdev->ddestroy);
  	bdev->dev_mapping = mapping;
-	bdev->glob = glob;
  	bdev->need_dma32 = need_dma32;
  	mutex_lock(&ttm_global_mutex);
  	list_add_tail(&bdev->device_list, &glob->device_list);
@@ -1921,8 +1915,7 @@ void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
  		.no_wait_gpu = false
  	};
- while (ttm_bo_swapout(bdev->glob, &ctx) == 0)
-		;
+	while (ttm_bo_swapout(&ttm_bo_glob, &ctx) == 0);
  }
  EXPORT_SYMBOL(ttm_bo_swapout_all);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index fe81c565e7ef..3940afa6f3ad 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -503,7 +503,7 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
  	 * TODO: Explicit member copy would probably be better here.
  	 */
- atomic_inc(&bo->bdev->glob->bo_count);
+	atomic_inc(&ttm_bo_glob.bo_count);
  	INIT_LIST_HEAD(&fbo->base.ddestroy);
  	INIT_LIST_HEAD(&fbo->base.lru);
  	INIT_LIST_HEAD(&fbo->base.swap);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 4aa007edffb0..263f4c33079a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -177,9 +177,9 @@ static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
  		}
if (bo->moving != moving) {
-			spin_lock(&bdev->glob->lru_lock);
+			spin_lock(&ttm_bo_glob.lru_lock);
  			ttm_bo_move_to_lru_tail(bo, NULL);
-			spin_unlock(&bdev->glob->lru_lock);
+			spin_unlock(&ttm_bo_glob.lru_lock);
  		}
  		dma_fence_put(moving);
  	}
diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
index b09c2c8caf13..8f1dcdd0c3f5 100644
--- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c
+++ b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
@@ -37,15 +37,11 @@ void ttm_eu_backoff_reservation(struct dma_resv_ctx *ticket,
  				struct list_head *list)
  {
  	struct ttm_validate_buffer *entry;
-	struct ttm_bo_global *glob;
if (list_empty(list))
  		return;
- entry = list_first_entry(list, struct ttm_validate_buffer, head);
-	glob = entry->bo->bdev->glob;
-
-	spin_lock(&glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	list_for_each_entry(entry, list, head) {
  		struct ttm_buffer_object *bo = entry->bo;
@@ -53,7 +49,7 @@ void ttm_eu_backoff_reservation(struct dma_resv_ctx *ticket,
  		if (!ticket)
  			dma_resv_unlock(bo->base.resv);
  	}
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
if (ticket) {
  		dma_resv_ctx_unlock_all(ticket);
@@ -79,15 +75,11 @@ int ttm_eu_reserve_buffers(struct dma_resv_ctx *ticket,
  			   struct list_head *dups)
  {
  	struct ttm_validate_buffer *entry;
-	struct ttm_bo_global *glob;
  	int ret;
if (list_empty(list))
  		return 0;
- entry = list_first_entry(list, struct ttm_validate_buffer, head);
-	glob = entry->bo->bdev->glob;
-
  	if (ticket)
  		dma_resv_ctx_init(ticket);
@@ -153,19 +145,14 @@ void ttm_eu_fence_buffer_objects(struct dma_resv_ctx *ticket,
  				 struct dma_fence *fence)
  {
  	struct ttm_validate_buffer *entry;
-	struct ttm_buffer_object *bo;
-	struct ttm_bo_global *glob;
if (list_empty(list))
  		return;
- bo = list_first_entry(list, struct ttm_validate_buffer, head)->bo;
-	glob = bo->bdev->glob;
-
-	spin_lock(&glob->lru_lock);
-
+	spin_lock(&ttm_bo_glob.lru_lock);
  	list_for_each_entry(entry, list, head) {
-		bo = entry->bo;
+		struct ttm_buffer_object *bo = entry->bo;
+
  		if (entry->num_shared)
  			dma_resv_add_shared_fence(bo->base.resv, fence);
  		else
@@ -174,7 +161,7 @@ void ttm_eu_fence_buffer_objects(struct dma_resv_ctx *ticket,
  		if (!ticket)
  			dma_resv_unlock(bo->base.resv);
  	}
-	spin_unlock(&glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	if (ticket) {
  		dma_resv_ctx_unlock_all(ticket);
  		dma_resv_ctx_fini(ticket);
diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
index 8617958b7ae6..acd63b70d814 100644
--- a/drivers/gpu/drm/ttm/ttm_memory.c
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -275,7 +275,7 @@ static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
while (ttm_zones_above_swap_target(glob, from_wq, extra)) {
  		spin_unlock(&glob->lock);
-		ret = ttm_bo_swapout(glob->bo_glob, ctx);
+		ret = ttm_bo_swapout(&ttm_bo_glob, ctx);
  		spin_lock(&glob->lock);
  		if (unlikely(ret != 0))
  			break;
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 627f8dc91d0e..b40a4678c296 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -1028,7 +1028,7 @@ void ttm_page_alloc_fini(void)
  static void
  ttm_pool_unpopulate_helper(struct ttm_tt *ttm, unsigned mem_count_update)
  {
-	struct ttm_mem_global *mem_glob = ttm->bdev->glob->mem_glob;
+	struct ttm_mem_global *mem_glob = &ttm_mem_glob;
  	unsigned i;
if (mem_count_update == 0)
@@ -1049,7 +1049,7 @@ ttm_pool_unpopulate_helper(struct ttm_tt *ttm, unsigned mem_count_update)
int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
  {
-	struct ttm_mem_global *mem_glob = ttm->bdev->glob->mem_glob;
+	struct ttm_mem_global *mem_glob = &ttm_mem_glob;
  	unsigned i;
  	int ret;
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index d594f7520b7b..9cb588a93d43 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -882,8 +882,8 @@ static gfp_t ttm_dma_pool_gfp_flags(struct ttm_dma_tt *ttm_dma, bool huge)
  int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
  			struct ttm_operation_ctx *ctx)
  {
+	struct ttm_mem_global *mem_glob = &ttm_mem_glob;
  	struct ttm_tt *ttm = &ttm_dma->ttm;
-	struct ttm_mem_global *mem_glob = ttm->bdev->glob->mem_glob;
  	unsigned long num_pages = ttm->num_pages;
  	struct dma_pool *pool;
  	struct dma_page *d_page;
@@ -987,8 +987,8 @@ EXPORT_SYMBOL_GPL(ttm_dma_populate);
  /* Put all pages in pages list to correct pool to wait for reuse */
  void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev)
  {
+	struct ttm_mem_global *mem_glob = &ttm_mem_glob;
  	struct ttm_tt *ttm = &ttm_dma->ttm;
-	struct ttm_mem_global *mem_glob = ttm->bdev->glob->mem_glob;
  	struct dma_pool *pool;
  	struct dma_page *d_page, *next;
  	enum pool_type type;
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 4332cc036483..381961979302 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -413,7 +413,6 @@ extern struct ttm_bo_global {
  	 */
struct kobject kobj;
-	struct ttm_mem_global *mem_glob;
  	struct page *dummy_read_page;
  	spinlock_t lru_lock;
@@ -457,7 +456,6 @@ struct ttm_bo_device {
  	 * Constant after bo device init / atomic.
  	 */
  	struct list_head device_list;
-	struct ttm_bo_global *glob;
  	struct ttm_bo_driver *driver;
  	struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
@@ -758,9 +756,9 @@ static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
   */
  static inline void ttm_bo_unreserve(struct ttm_buffer_object *bo)
  {
-	spin_lock(&bo->bdev->glob->lru_lock);
+	spin_lock(&ttm_bo_glob.lru_lock);
  	ttm_bo_move_to_lru_tail(bo, NULL);
-	spin_unlock(&bo->bdev->glob->lru_lock);
+	spin_unlock(&ttm_bo_glob.lru_lock);
  	dma_resv_unlock(bo->base.resv);
  }
diff --git a/include/drm/ttm/ttm_memory.h b/include/drm/ttm/ttm_memory.h
index 3ff48a0a2d7b..c78ea99c42cf 100644
--- a/include/drm/ttm/ttm_memory.h
+++ b/include/drm/ttm/ttm_memory.h
@@ -65,7 +65,6 @@
  struct ttm_mem_zone;
  extern struct ttm_mem_global {
  	struct kobject kobj;
-	struct ttm_bo_global *bo_glob;
  	struct workqueue_struct *swap_queue;
  	struct work_struct work;
  	spinlock_t lock;

lgtm.

Reviewed-by: Thomas Hellström <thellstrom@xxxxxxxxxx>


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