linux-kernel - Re: [PATCH 01/22] virtio: store owner from modules with register_virtio

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Message-ID: <e2xy5kjdctpitcrev2byqc5gcwntvsd6pfutrvp3l2kfe3llgs@l2xp5opj7xu2>
Date: Fri, 29 Mar 2024 14:28:27 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
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Subject: Re: [PATCH 01/22] virtio: store owner from modules with
 register_virtio_driver()

On Fri, Mar 29, 2024 at 01:07:31PM +0100, Krzysztof Kozlowski wrote:
>On 29/03/2024 12:42, Stefano Garzarella wrote:
>>> };
>>>
>>> -int register_virtio_driver(struct virtio_driver *driver)
>>> +int __register_virtio_driver(struct virtio_driver *driver, struct module *owner)
>>> {
>>> 	/* Catch this early. */
>>> 	BUG_ON(driver->feature_table_size && !driver->feature_table);
>>> 	driver->driver.bus = &virtio_bus;
>>> +	driver->driver.owner = owner;
>>> +
>>
>> `.driver.name =  KBUILD_MODNAME` also seems very common, should we put
>> that in the macro as well?
>
>This is a bit different thing. Every driver is expected to set owner to
>itself (THIS_MODULE), but is every driver name KBUILD_MODNAME?

Nope, IIUC we have 2 exceptions:
- drivers/firmware/arm_scmi/virtio.c
- arch/um/drivers/virt-pci.c

>Remember that this overrides whatever driver actually put there.

They can call __register_virtio_driver() where we can add the `name`
parameter. That said, I don't have a strong opinion, we can leave it
as it is.

Thanks,
Stefano