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Date: Fri, 29 Mar 2024 14:28:27 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: "Michael S. Tsirkin" <mst@...hat.com>, 
	Jason Wang <jasowang@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
	Richard Weinberger <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>, 
	Johannes Berg <johannes@...solutions.net>, Paolo Bonzini <pbonzini@...hat.com>, 
	Stefan Hajnoczi <stefanha@...hat.com>, Jens Axboe <axboe@...nel.dk>, 
	Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	Olivia Mackall <olivia@...enic.com>, Herbert Xu <herbert@...dor.apana.org.au>, 
	Amit Shah <amit@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Gonglei <arei.gonglei@...wei.com>, 
	"David S. Miller" <davem@...emloft.net>, Viresh Kumar <vireshk@...nel.org>, 
	Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>, 
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	Mathieu Poirier <mathieu.poirier@...aro.org>, "Martin K. Petersen" <martin.petersen@...cle.com>, 
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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


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