linux-kernel - Re: [PATCH v2] selftests/seccomp: Fix seccomp failure by adding missing headers

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Date:   Tue, 15 Feb 2022 18:51:05 +0000
From:   Sherry Yang <sherry.yang@...cle.com>
To:     Shuah Khan <skhan@...uxfoundation.org>
CC:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        "shuah@...nel.org" <shuah@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        "luto@...capital.net" <luto@...capital.net>,
        "wad@...omium.org" <wad@...omium.org>,
        "christian@...uner.io" <christian@...uner.io>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "andrii@...nel.org" <andrii@...nel.org>,
        "kafai@...com" <kafai@...com>,
        "songliubraving@...com" <songliubraving@...com>,
        "yhs@...com" <yhs@...com>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...nel.org" <kpsingh@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>
Subject: Re: [PATCH v2] selftests/seccomp: Fix seccomp failure by adding
 missing headers


> On Feb 15, 2022, at 10:43 AM, Shuah Khan <skhan@...uxfoundation.org> wrote:
> 
> On 2/15/22 11:17 AM, Muhammad Usama Anjum wrote:
>> On 2/14/22 9:12 PM, Muhammad Usama Anjum wrote:
>>>>> "../../../../usr/include/" directory doesn't have header files if
>>>>> different output directory is used for kselftests build like "make -C
>>>>> tools/tests/selftest O=build". Can you try adding recently added
>>>>> variable, KHDR_INCLUDES here which makes this kind of headers inclusion
>>>>> easy and correct for other build combinations as well?
>>>>> 
>>>>> 
>>>> 
>>>> Hi Muhammad,
>>>> 
>>>> I just pulled linux-next, and tried with KHDR_INCLUDES. It works. Very nice
>>>> work! I really appreciate you made headers inclusion compatible. However,
>>>> my case is a little more complicated. It will throw warnings with -I, using
>>>> -isystem can suppress these warnings, more details please refer to
>>>> https://urldefense.com/v3/__https://lore.kernel.org/all/C340461A-6FD2-440A-8EFC-D7E85BF48DB5@oracle.com/__;!!ACWV5N9M2RV99hQ!e4ajMH2HRzLNZZDe3Z1iqAO7L8SVjqnvp-a5NfT6I-mKD59xjA-zHM8TAfkJM1Udcg$ 
>>>> According to this case, do you think will it be better to export header path
>>>> (KHDR_INCLUDES) without “-I”?
>>> Well said. I've thought about it and it seems like -isystem is better
>>> than -I. I've sent a patch:
>>> https://urldefense.com/v3/__https://lore.kernel.org/linux-kselftest/20220214160756.3543590-1-usama.anjum@collabora.com/__;!!ACWV5N9M2RV99hQ!e4ajMH2HRzLNZZDe3Z1iqAO7L8SVjqnvp-a5NfT6I-mKD59xjA-zHM8TAfk0AVSbFg$ I'm looking forward to discussion on it.
>> The patch has been accepted. It should appear in linux-next soon. You
>> should be able to use KHDR_INCLUDES easily now.
> 
> Sherry,
> 
> I pulled in your patch as a fix as is for 5.17-rc5.
> 
> Using KHDR_INCLUDES can be separate patch for next release.
> This way the fix is going to be pulled for this release
> without dependencies on other patches.
> 
> thanks,
> -- Shuah


Oh, I just sent out v3 patch before I received the updates. Okay, I will send
a separate patch with KHDR_INCLUDES later.

Thanks,
Sherry