Quoting Tvrtko Ursulin (2020-03-09 18:31:18)
> +struct i915_drm_client *
> +i915_drm_client_add(struct i915_drm_clients *clients, struct task_struct *task)
> +{
> + struct i915_drm_client *client;
> + int ret;
> +
> + client = kzalloc(sizeof(*client), GFP_KERNEL);
> + if (!client)
> + return ERR_PTR(-ENOMEM);
> +
> + kref_init(&client->kref);
> + client->clients = clients;
> +
> + ret = mutex_lock_interruptible(&clients->lock);
> + if (ret)
> + goto err_id;
> + ret = xa_alloc_cyclic(&clients->xarray, &client->id, client,
> + xa_limit_32b, &clients->next_id, GFP_KERNEL);
So what's next_id used for that explains having the over-arching mutex?
-Chris
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