[edk2-devel] [PATCH 0/3] BaseTools, EmbeddedPkg, Maintainers.txt: Obsolete some drivers
Ard Biesheuvel
ard.biesheuvel at arm.com
Thu Apr 30 13:43:22 UTC 2020
On 4/30/20 3:28 PM, Leif Lindholm wrote:
> On Thu, Apr 30, 2020 at 13:17:26 +0200, Laszlo Ersek wrote:
>> On 04/29/20 23:47, Ard Biesheuvel wrote:
>>> On 4/29/20 11:45 PM, Leif Lindholm wrote:
>>>> On Wed, Apr 29, 2020 at 22:04:08 +0200, Ard Biesheuvel wrote:
>>>>>>> I am mostly concerned about the use of MmcDxe in new platforms. The
>>>>>>> other
>>>>>>> bits I'm not too worried about, and I think it would be fine to
>>>>>>> move those
>>>>>>> into Platform/ARM/VExpressPkg in edk2-platforms, instead of hoping
>>>>>>> that
>>>>>>> someone will turn up and turn them into driver model drivers.
>>>>>>
>>>>>> We could, although I would prefer not adding code to edk2-platforms
>>>>>> that would not be accepted was it submitted as a new contribution.
>>>>>> The SATA controller, I would ideally re-review and merge properly.
>>>>>>
>>>>>> If we do include the other drivers in platform-specific directories, I
>>>>>> want them to come with ... strongly worded readmes.
>>>>>>
>>>>>
>>>>> Right.
>>>>>
>>>>> Should we have some format for that? A way to log shortcomings along
>>>>> with
>>>>> the code?
>>>>
>>>> Thinking a bit more on this, maybe what we should do is add a template
>>>> to each file's top comment block. Draft proposal:
>>>>
>>>> *
>>>> * WARNING:
>>>> * This driver fails to follow the UEFI driver model without a good
>>>> * reason, and only remains in the tree because it is still used by
>>>> * a small number of platforms. It will removed when no longer used.
>>>> * New platforms should not use it, and no one should use this as
>>>> * reference code for developing new drivers.
>>>> *
>>>>
>>>
>>> Works for me
>>>
>>
>> You could also (or alternatively) add a separate file "DEPRECATED.txt"
>> to the directory -- sometimes people don't read file-top comments,
>> before duplicating or editing code. Something that's visible with a
>> simple "ls -l" might stand out more.
>
> I think what's more visible depends on the use-case.
> A comment at the top of the file is at least very visible to the
> reviewer if someone submits Yet Another Clone of an inadvisible
> driver.
>
> A DEPRECATED.txt might be a good ide for something like the
> EmbeddedPkg MmcDxe which we wan't people to stop *using* as opposed to
> copying.
>
> Ard?
>
Agreed. People tend to look at the file header when they add their
copyright, so putting it in each file seems like a sensible way to do this.
As for using the likes of MmcDxe: perhaps we should add a
i-am-deprecated PCD that defaults to a value that prevents it from working?
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