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Date: Wed, 13 Apr 2022 09:16:30 +0800
From: 王洪亮 <>
Subject: Re: Re: add loongarch64 port

在 2022/4/12 上午9:11, 王洪亮 写道:
> 在 2022/4/11 下午9:01, Arnd Bergmann 写道:
>> On Mon, Apr 11, 2022 at 2:11 PM Rich Felker <> wrote:
>>> On Mon, Apr 11, 2022 at 10:03:13AM +0200, Arnd Bergmann wrote:
>>>> On Sun, Apr 10, 2022 at 5:27 PM Rich Felker <> wrote:
>>>>> On Sun, Apr 10, 2022 at 12:30:59PM +0200, Arnd Bergmann wrote:
>>>>>> On Sat, Apr 9, 2022 at 3:31 PM Rich Felker <> wrote:
>>>>>>> Actually, if there aren't yet archs lacking SYS_clone, this API
>>>>>>> regression may be a good argument not to drop SYS_clone on new 
>>>>>>> archs
>>>>>>> yet until there's a way for new archs to get the same behavior
>>>>>>> (unspecified stack size).
>>>>>> That is a good point, but it also appears that the behavior of
>>>>>> clone3() is unintentional
>>>>>> here, I'm fairly sure it was meant to be a drop-in replacement 
>>>>>> for clone() with
>>>>>> additional features.
>>>>>> Not sure what the best fix for this is, as the check for size==0 
>>>>>> was clearly
>>>>>> intentional, but seems to prevent this from working. A special 
>>>>>> flag to ignore
>>>>>> the size, or a magic size value like -1ull might work, but 
>>>>>> neither of them
>>>>>> is a great interface.
>>>>> Are there archs already affected, or will this one be the first?
>>>> We have not added any other architectures since clone3 got added,
>>>> so this is the first one.
>>> In that case I really think __NR_clone should just be kept for now. It
>>> doesn't really cost anything on the kernel side and it avoids a
>>> dependency on working out how __NR_clone3 is going to fix the missing
>>> functionality.
>> Yes, fair enough.
>>          Arnd
> Do I need to implement __clone3 for future called in LoongArch port ?
> Hongliang Wang.


Have any other issues to modify in LoongArch port ?

Hongliang wang

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