linux-kernel - Re: [PATCH v5 00/68] Define _GNU

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Date: Wed, 22 May 2024 12:40:36 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Edward Liaw <edliaw@...gle.com>, Jakub Kicinski <kuba@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, shuah@...nel.org,
 Mickaël Salaün <mic@...ikod.net>,
 Günther Noack <gnoack@...gle.com>,
 Christian Brauner <brauner@...nel.org>,
 Richard Cochran <richardcochran@...il.com>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 "David S. Miller" <davem@...emloft.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org, kernel-team@...roid.com,
 linux-security-module@...r.kernel.org, netdev@...r.kernel.org,
 linux-riscv@...ts.infradead.org, bpf@...r.kernel.org,
 Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v5 00/68] Define _GNU_SOURCE for sources using

On 5/22/24 11:44, Edward Liaw wrote:
> On Wed, May 22, 2024 at 10:13 AM Jakub Kicinski <kuba@...nel.org> wrote:
>>
>> On Wed, 22 May 2024 10:19:33 -0600 Shuah Khan wrote:
>>> On 5/21/24 18:56, Edward Liaw wrote:
>>>> Centralizes the definition of _GNU_SOURCE into KHDR_INCLUDES and removes
>>>> redefinitions of _GNU_SOURCE from source code.
>>>>
>>>> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
>>>> asprintf into kselftest_harness.h, which is a GNU extension and needs
>>>
>>> Easier solution to define LINE_MAX locally. In gerenal it is advisable
>>> to not add local defines, but it is desirable in some cases to avoid
>>> churn like this one.
>>
>> Will the patch that Andrew applied:
>> https://lore.kernel.org/all/20240519213733.2AE81C32781@smtp.kernel.org/
>> make its way to Linus? As you say that's a much simpler fix.
> 

Thank you Jakub. Yes. This is a simpler fix.

> Right, this patch series may be unnecessary after all, since the
> problem is fixed by that patch.
> 
> It might be better to drop the series unless it is desirable to
> centralize the declaration of _GNU_SOURCE to the root Makefile /
> lib.mk.  If that is still wanted, maybe a more palatable approach
> would be to surround every instance of #define _GNU_SOURCE with
> #ifndef _GNU_SOURCE first, then induce the change to CFLAGS in lib.mk.
> That would prevent a partial merge from triggering build warnings.

Please drop this series.

thanks,
-- Shuah