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

[Al Viro <viro@zeniv.linux.org.uk>]

[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>
---
 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;
 
-- 
2.39.5