drm/amdgpu: remove mclk_lock

Not needed any more.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1558,8 +1558,6 @@ struct amdgpu_dpm {
 
 struct amdgpu_pm {
 	struct mutex		mutex;
-	/* write locked while reprogramming mclk */
-	struct rw_semaphore	mclk_lock;
 	u32                     current_sclk;
 	u32                     current_mclk;
 	u32                     default_sclk;

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1401,7 +1401,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	mutex_init(&adev->gfx.gpu_clock_mutex);
 	mutex_init(&adev->srbm_mutex);
 	mutex_init(&adev->grbm_idx_mutex);
-	init_rwsem(&adev->pm.mclk_lock);
 	init_rwsem(&adev->exclusive_lock);
 	mutex_init(&adev->mn_lock);
 	hash_init(adev->mn_hash);

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

@@ -272,11 +272,9 @@ int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
 	bo->flags = flags;
 	amdgpu_fill_placement_to_bo(bo, placement);
 	/* Kernel allocation are uninterruptible */
-	down_read(&adev->pm.mclk_lock);
 	r = ttm_bo_init(&adev->mman.bdev, &bo->tbo, size, type,
 			&bo->placement, page_align, !kernel, NULL,
 			acc_size, sg, NULL, &amdgpu_ttm_bo_destroy);
-	up_read(&adev->pm.mclk_lock);
 	if (unlikely(r != 0)) {
 		return r;
 	}

drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c

@@ -581,7 +581,6 @@ static void amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 	}
 
 	mutex_lock(&adev->ddev->struct_mutex);
-	down_write(&adev->pm.mclk_lock);
 	mutex_lock(&adev->ring_lock);
 
 	/* update whether vce is active */
@@ -629,7 +628,6 @@ static void amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 
 done:
 	mutex_unlock(&adev->ring_lock);
-	up_write(&adev->pm.mclk_lock);
 	mutex_unlock(&adev->ddev->struct_mutex);
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -966,52 +966,20 @@ void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size)
 	man->size = size >> PAGE_SHIFT;
 }
 
-static struct vm_operations_struct amdgpu_ttm_vm_ops;
-static const struct vm_operations_struct *ttm_vm_ops = NULL;
-
-static int amdgpu_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
-	struct ttm_buffer_object *bo;
-	struct amdgpu_device *adev;
-	int r;
-
-	bo = (struct ttm_buffer_object *)vma->vm_private_data;
-	if (bo == NULL) {
-		return VM_FAULT_NOPAGE;
-	}
-	adev = amdgpu_get_adev(bo->bdev);
-	down_read(&adev->pm.mclk_lock);
-	r = ttm_vm_ops->fault(vma, vmf);
-	up_read(&adev->pm.mclk_lock);
-	return r;
-}
-
 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	struct drm_file *file_priv;
 	struct amdgpu_device *adev;
-	int r;
 
-	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
+	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 		return -EINVAL;
-	}
 
 	file_priv = filp->private_data;
 	adev = file_priv->minor->dev->dev_private;
-	if (adev == NULL) {
+	if (adev == NULL)
 		return -EINVAL;
-	}
-	r = ttm_bo_mmap(filp, vma, &adev->mman.bdev);
-	if (unlikely(r != 0)) {
-		return r;
-	}
-	if (unlikely(ttm_vm_ops == NULL)) {
-		ttm_vm_ops = vma->vm_ops;
-		amdgpu_ttm_vm_ops = *ttm_vm_ops;
-		amdgpu_ttm_vm_ops.fault = &amdgpu_ttm_fault;
-	}
-	vma->vm_ops = &amdgpu_ttm_vm_ops;
-	return 0;
+
+	return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
 }
 
 int amdgpu_copy_buffer(struct amdgpu_ring *ring,