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Re: [PATCH 06/19] xen: Clean up asm-generic/device.h
- To: Alejandro Vallejo <agarciav@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 2 Jun 2025 16:24:36 +0200
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- Cc: Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 02 Jun 2025 14:24:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.06.2025 16:19, Alejandro Vallejo wrote:
> On Mon Jun 2, 2025 at 9:51 AM CEST, Jan Beulich wrote:
>> On 30.05.2025 14:02, Alejandro Vallejo wrote:
>>> --- a/xen/include/asm-generic/device.h
>>> +++ b/xen/include/asm-generic/device.h
>>> @@ -6,9 +6,7 @@
>>>
>>> enum device_type
>>> {
>>> -#ifdef CONFIG_HAS_DEVICE_TREE
>>> DEV_DT,
>>> -#endif
>>
>> Why would this enumerator need exposing on a non-DT arch? In fact I would
>> have
>> hoped for ...
>
> A non-DT arch would not include this. x86 doesn't.
Both here and ...
>>> DEV_PCI
>>
>> ... this to be hidden for arch-es not supporting PCI.
>>
>> Similar concerns elsewhere in this change.
>
> This file is exclusively used by arches supporting DT to abstract away where
> the device came from. x86 does not use it at all, and while it wouldn't be
> impossible to compile-out DEV_PCI, it would needlessly pollute the codebase
> with
> no measurable gain, because the abstractions still need to stay.
... here: In "xen/include/asm-generic/device.h" there's nothing at all saying
that this file is a DT-only one. Instead there is something in there saying
that it's suitable to use in the entirely "generic" case.
Jan
|
