linux-kernel - Re: [PATCH bpf-next] bpf: Make some symbols static

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Date:   Wed, 19 May 2021 17:13:42 +0000
From:   Song Liu <songliubraving@...com>
To:     Pu Lehui <pulehui@...wei.com>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, Martin Lau <kafai@...com>,
        Yonghong Song <yhs@...com>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...nel.org" <kpsingh@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next] bpf: Make some symbols static



> On May 18, 2021, at 11:41 PM, Pu Lehui <pulehui@...wei.com> wrote:
> 
> The sparse tool complains as follows:
> 
> kernel/bpf/syscall.c:4567:29: warning:
> symbol 'bpf_sys_bpf_proto' was not declared. Should it be static?
> kernel/bpf/syscall.c:4592:29: warning:
> symbol 'bpf_sys_close_proto' was not declared. Should it be static?
> 
> This symbol is not used outside of syscall.c, so marks it static.
> 
> Signed-off-by: Pu Lehui <pulehui@...wei.com>

Acked-by: Song Liu <songliubraving@...com>

> ---
> kernel/bpf/syscall.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
> index 2361d97e2c67..73d15bc62d8c 100644
> --- a/kernel/bpf/syscall.c
> +++ b/kernel/bpf/syscall.c
> @@ -4564,7 +4564,7 @@ BPF_CALL_3(bpf_sys_bpf, int, cmd, void *, attr, u32, attr_size)
> 	return __sys_bpf(cmd, KERNEL_BPFPTR(attr), attr_size);
> }
> 
> -const struct bpf_func_proto bpf_sys_bpf_proto = {
> +static const struct bpf_func_proto bpf_sys_bpf_proto = {
> 	.func		= bpf_sys_bpf,
> 	.gpl_only	= false,
> 	.ret_type	= RET_INTEGER,
> @@ -4589,7 +4589,7 @@ BPF_CALL_1(bpf_sys_close, u32, fd)
> 	return close_fd(fd);
> }
> 
> -const struct bpf_func_proto bpf_sys_close_proto = {
> +static const struct bpf_func_proto bpf_sys_close_proto = {
> 	.func		= bpf_sys_close,
> 	.gpl_only	= false,
> 	.ret_type	= RET_INTEGER,
> -- 
> 2.17.1
>