Re: [PATCH v3 27/68] selftests/landlock: Drop define _GNU_SOURCE

From: "Mickaël Salaün" <mic@digikod.net>
To: Edward Liaw <edliaw@google.com>
Cc: shuah@kernel.org, "Günther Noack" <gnoack@google.com>,
	"Christian Brauner" <brauner@kernel.org>,
	"Richard Cochran" <richardcochran@gmail.com>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"David S. Miller" <davem@davemloft.net>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Jesper Dangaard Brouer" <hawk@kernel.org>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"Muhammad Usama Anjum" <usama.anjum@collabora.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
	kernel-team@android.com, linux-security-module@vger.kernel.org,
	netdev@vger.kernel.org, linux-riscv@lists.infradead.org,
	bpf@vger.kernel.org, "John Hubbard" <jhubbard@nvidia.com>
Subject: Re: [PATCH v3 27/68] selftests/landlock: Drop define _GNU_SOURCE
Date: Mon, 13 May 2024 07:11:31 +0200	[thread overview]
Message-ID: <20240513.wo9coof8Dae4@digikod.net> (raw)
In-Reply-To: <20240509200022.253089-28-edliaw@google.com>

On Thu, May 09, 2024 at 07:58:19PM +0000, Edward Liaw wrote:
> _GNU_SOURCE is provided by lib.mk, so it should be dropped to prevent
> redefinition warnings.
> 
> Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
> Reviewed-by: John Hubbard <jhubbard@nvidia.com>
> Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
> Signed-off-by: Edward Liaw <edliaw@google.com>

Please only remove lines with _GNU_SOURCE, not the empty lines.  I think
it would be better to not change such style choice for other subsystems
too.
With this change for the Landlock selftests:
Acked-by: Mickaël Salaün <mic@digikod.net>

> ---
>  tools/testing/selftests/landlock/base_test.c   | 2 --
>  tools/testing/selftests/landlock/fs_test.c     | 2 --
>  tools/testing/selftests/landlock/net_test.c    | 2 --
>  tools/testing/selftests/landlock/ptrace_test.c | 2 --
>  4 files changed, 8 deletions(-)
> 
> diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
> index 3c1e9f35b531..c86e6f87b398 100644
> --- a/tools/testing/selftests/landlock/base_test.c
> +++ b/tools/testing/selftests/landlock/base_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 6b5a9ff88c3d..eec0d9a44d50 100644
> --- a/tools/testing/selftests/landlock/fs_test.c
> +++ b/tools/testing/selftests/landlock/fs_test.c
> @@ -6,8 +6,6 @@
>   * Copyright © 2020 ANSSI
>   * Copyright © 2020-2022 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <asm/termbits.h>
>  #include <fcntl.h>
>  #include <libgen.h>
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index f21cfbbc3638..eed040adcbac 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2022-2023 Huawei Tech. Co., Ltd.
>   * Copyright © 2023 Microsoft Corporation
>   */
> -
> -#define _GNU_SOURCE
>  #include <arpa/inet.h>
>  #include <errno.h>
>  #include <fcntl.h>
> diff --git a/tools/testing/selftests/landlock/ptrace_test.c b/tools/testing/selftests/landlock/ptrace_test.c
> index a19db4d0b3bd..c831e6d03b02 100644
> --- a/tools/testing/selftests/landlock/ptrace_test.c
> +++ b/tools/testing/selftests/landlock/ptrace_test.c
> @@ -5,8 +5,6 @@
>   * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
>   * Copyright © 2019-2020 ANSSI
>   */
> -
> -#define _GNU_SOURCE
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <linux/landlock.h>
> -- 
> 2.45.0.118.g7fe29c98d7-goog
> 
> 