[PATCH v7 05/28] dma-heap: Add proper kref handling on dma-buf heaps

[Markus Elfring]

…
> +++ b/drivers/dma-buf/dma-heap.c
…
> +static void dma_heap_release(struct kref *ref)
> +{
…
> +	mutex_lock(&heap_list_lock);
> +	list_del(&heap->list);
> +	mutex_unlock(&heap_list_lock);
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&heap_list_lock);”?
https://elixir.bootlin.com/linux/v6.10/source/include/linux/mutex.h#L196

Regards,
Markus