[PATCH v2 bpf 2/5] bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic

[Andrii Nakryiko <andrii@xxxxxxxxxx>]

get_pid_task() internally already calls rcu_read_lock() and
rcu_read_unlock(), so there is no point to do this one extra time.

This is a drive-by improvement and has no correctness implications.

Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
 kernel/trace/bpf_trace.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 1baaeb9ca205..6249dac61701 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -3423,9 +3423,7 @@ int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *pr
 	}
 
 	if (pid) {
-		rcu_read_lock();
 		task = get_pid_task(find_vpid(pid), PIDTYPE_TGID);
-		rcu_read_unlock();
 		if (!task) {
 			err = -ESRCH;
 			goto error_path_put;
-- 
2.43.0