Re: [bpf_iter] get rid of redundant 3rd argument of prepare_seq_file()

[Yonghong Song <yonghong.song@linux.dev>]

On 6/14/25 5:47 PM, Al Viro wrote:
> [don't really care which tree that goes through; right now it's
> in viro/vfs.git #work.misc, but if somebody prefers to grab it
> through a different tree, just say so]
> always equal to __get_seq_info(2nd argument)
>
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

LGTM. Thanks for simplifying the code.

Acked-by: Yonghong Song <yonghong.song@linux.dev>

> ---
>   kernel/bpf/bpf_iter.c | 11 +++++------
>   1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c
> index 380e9a7cac75..303ab1f42d3a 100644
> --- a/kernel/bpf/bpf_iter.c
> +++ b/kernel/bpf/bpf_iter.c
> @@ -38,8 +38,7 @@ static DEFINE_MUTEX(link_mutex);
>   /* incremented on every opened seq_file */
>   static atomic64_t session_id;
>   
> -static int prepare_seq_file(struct file *file, struct bpf_iter_link *link,
> -			    const struct bpf_iter_seq_info *seq_info);
> +static int prepare_seq_file(struct file *file, struct bpf_iter_link *link);
>   
>   static void bpf_iter_inc_seq_num(struct seq_file *seq)
>   {
> @@ -257,7 +256,7 @@ static int iter_open(struct inode *inode, struct file *file)
>   {
>   	struct bpf_iter_link *link = inode->i_private;
>   
> -	return prepare_seq_file(file, link, __get_seq_info(link));
> +	return prepare_seq_file(file, link);
>   }
>   
>   static int iter_release(struct inode *inode, struct file *file)
> @@ -586,9 +585,9 @@ static void init_seq_meta(struct bpf_iter_priv_data *priv_data,
>   	priv_data->done_stop = false;
>   }
>   
> -static int prepare_seq_file(struct file *file, struct bpf_iter_link *link,
> -			    const struct bpf_iter_seq_info *seq_info)
> +static int prepare_seq_file(struct file *file, struct bpf_iter_link *link)
>   {
> +	const struct bpf_iter_seq_info *seq_info = __get_seq_info(link);
>   	struct bpf_iter_priv_data *priv_data;
>   	struct bpf_iter_target_info *tinfo;
>   	struct bpf_prog *prog;
> @@ -653,7 +652,7 @@ int bpf_iter_new_fd(struct bpf_link *link)
>   	}
>   
>   	iter_link = container_of(link, struct bpf_iter_link, link);
> -	err = prepare_seq_file(file, iter_link, __get_seq_info(iter_link));
> +	err = prepare_seq_file(file, iter_link);
>   	if (err)
>   		goto free_file;
>