Re: [kvm-unit-tests PATCH v4 2/3] s390x: define UV compatible I/O allocation

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On 1/21/21 2:02 PM, Pierre Morel wrote:
> 
> 
> On 1/21/21 10:46 AM, Janosch Frank wrote:
>> On 1/21/21 10:13 AM, Pierre Morel wrote:
>>> To centralize the memory allocation for I/O we define
>>> the alloc_io_page/free_io_page functions which share the I/O
>>> memory with the host in case the guest runs with
>>> protected virtualization.
>>>
>>> Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
>>> ---
>>>   MAINTAINERS           |  1 +
>>>   lib/s390x/malloc_io.c | 70 +++++++++++++++++++++++++++++++++++++++++++
>>>   lib/s390x/malloc_io.h | 45 ++++++++++++++++++++++++++++
>>>   s390x/Makefile        |  1 +
>>>   4 files changed, 117 insertions(+)
>>>   create mode 100644 lib/s390x/malloc_io.c
>>>   create mode 100644 lib/s390x/malloc_io.h
>>>
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 54124f6..89cb01e 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -82,6 +82,7 @@ M: Thomas Huth <thuth@xxxxxxxxxx>
>>>   M: David Hildenbrand <david@xxxxxxxxxx>
>>>   M: Janosch Frank <frankja@xxxxxxxxxxxxx>
>>>   R: Cornelia Huck <cohuck@xxxxxxxxxx>
>>> +R: Pierre Morel <pmorel@xxxxxxxxxxxxx>
>>
>> If you're ok with the amount of mails you'll get then go ahead.
>> But I think maintainer file changes should always be in a separate patch.
>>
>>>   L: kvm@xxxxxxxxxxxxxxx
>>>   L: linux-s390@xxxxxxxxxxxxxxx
>>>   F: s390x/*
>>> diff --git a/lib/s390x/malloc_io.c b/lib/s390x/malloc_io.c
>>> new file mode 100644
>>> index 0000000..bfe8c6a
>>> --- /dev/null
>>> +++ b/lib/s390x/malloc_io.c
>>> @@ -0,0 +1,70 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>
>> I think we wanted to use:
> 
> @Janosch , @Thomas
> 
>> /* SPDX-License-Identifier: GPL-2.0-or-later */
> 
> or
> 
> // SPDX-License-Identifier: GPL-2.0-only
> 
> later or only ?
> 
> /* or // ?
> 
> 
> If both are OK, I will take the Janosch proposition which is in use in 
> vm.[ch] and ignore the Linux checkpatch warning.
> 
> Just to : Why are you people not using the Linux style code completely 
> instead of making new exceptions.
> 
> i.e. SPDX license and MAINTAINERS
> 

s390 also has /* */ style SPDX and GPL2.0+ statements in the kernel...

Since KUT has way less developers the style rules aren't as strict and
currently I see that as an advantage. Following checkpatch down the
cliff is a bad idea in the kernel and for unit tests. It's most often
correct, but not always.



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