linux-kernel - Re: [PATCH] selftests/bpf: Add __init and __exit to the functions bpf_test_no_cfi_init()/bpf_test_no_cfi

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Message-ID: <511a2e2f-6bdd-4e62-b647-796ca4c53119@iogearbox.net>
Date: Wed, 2 Oct 2024 14:15:23 +0200
From: Daniel Borkmann <daniel@...earbox.net>
To: Yaxiong Tian <tianyaxiong@...inos.cn>, martin.lau@...ux.dev,
 ast@...nel.org, andrii@...nel.org, shuah@...nel.org, hinker.li@...il.com
Cc: bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, Yaxiong Tian <iambestgod@...look.com>
Subject: Re: [PATCH] selftests/bpf: Add __init and __exit to the functions
 bpf_test_no_cfi_init()/bpf_test_no_cfi_exit()

On 9/30/24 3:33 AM, Yaxiong Tian wrote:
> From: Yaxiong Tian <iambestgod@...look.com>
>
> To save some running memory,Add __init and __exit to the
> module load/unload functions.
>
> Signed-off-by: Yaxiong Tian <tianyaxiong@...inos.cn>
> ---
>   tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c b/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c
> index 948eb3962732..aa571ab3c6c6 100644
> --- a/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c
> +++ b/tools/testing/selftests/bpf/bpf_test_no_cfi/bpf_test_no_cfi.c
> @@ -56,7 +56,7 @@ static struct bpf_struct_ops test_no_cif_ops = {
>   	.owner = THIS_MODULE,
>   };
>   
> -static int bpf_test_no_cfi_init(void)
> +static int __init bpf_test_no_cfi_init(void)
>   {
>   	int ret;
>   
> @@ -71,7 +71,7 @@ static int bpf_test_no_cfi_init(void)
>   	return ret;
>   }
>   
> -static void bpf_test_no_cfi_exit(void)
> +static void __exit bpf_test_no_cfi_exit(void)
>   {
>   }
Not that the memory saving matters too much in this context, but lets also
annotate bpf_testmod_init and bpf_testmod_exit while at it?

Thanks,
Daniel