bpf: Remove redundant assignment to meta.seq in __task_seq_show()

The seq argument is assigned to meta.seq twice, the second one is
redundant, remove it.

This patch also removes a redundant space in bpf_iter_link_attach().

Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20220410060020.307283-1-ytcoode@gmail.com

Author: ytcoode

kernel/bpf/bpf_iter.c

@@ -545,7 +545,7 @@ int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr,
 	bpf_link_init(&link->link, BPF_LINK_TYPE_ITER, &bpf_iter_link_lops, prog);
 	link->tinfo = tinfo;
 
-	err  = bpf_link_prime(&link->link, &link_primer);
+	err = bpf_link_prime(&link->link, &link_primer);
 	if (err) {
 		kfree(link);
 		return err;

kernel/bpf/task_iter.c

@@ -99,7 +99,6 @@ static int __task_seq_show(struct seq_file *seq, struct task_struct *task,
 	if (!prog)
 		return 0;
 
-	meta.seq = seq;
 	ctx.meta = &meta;
 	ctx.task = task;
 	return bpf_iter_run_prog(prog, &ctx);