* bus-specific setup
* @p: The private data of the driver core, only the driver core can
* touch this.
+ * @lock_key: Lock class key for use by the lock validator
*
* A bus is a channel between the processor and one or more devices. For the
* purposes of the device model, all devices are connected via a bus, even if
* segment limitations.
* @dma_pools: Dma pools (if dma'ble device).
* @dma_mem: Internal for coherent mem override.
+ * @cma_area: Contiguous memory area for dma allocations
* @archdata: For arch-specific additions.
* @of_node: Associated device tree node.
* @acpi_node: Associated ACPI device node.
* @release: Callback to free the device after all references have
* gone away. This should be set by the allocator of the
* device (i.e. the bus driver that discovered the device).
+ * @iommu_group: IOMMU group the device belongs to.
*
* At the lowest level, every device in a Linux system is represented by an
* instance of struct device. The device structure contains the information