[PATCH v4 3/5] tracing/kprobes: Skip setup_boot_kprobe_events() when no cmdline event

Yaxiong Tian
2026-01-28T12:55:18Z

When the 'kprobe_event=' kernel command-line parameter is not provided,
there is no need to execute setup_boot_kprobe_events().

This change optimizes the initialization function init_kprobe_trace()
by skipping unnecessary work and effectively prevents potential blocking
that could arise from contention on the event_mutex lock in subsequent
operations.

Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
---
kernel/trace/trace_kprobe.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 9953506370a5..89d2740f7bb5 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -2048,6 +2048,10 @@ static __init int init_kprobe_trace(void)
trace_create_file("kprobe_profile", TRACE_MODE_READ,
NULL, NULL, &kprobe_profile_ops);

+ /* If no 'kprobe_event=' cmd is provided, return directly. */
+ if (kprobe_boot_events_buf[0] == '\0')
+ return 0;
+
setup_boot_kprobe_events();

return 0;
--
2.25.1