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tracing/kprobes: Skip setup_boot_kprobe_events() when no cmdline event

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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.

Link: https://patch.msgid.link/20260204015401.163748-1-tianyaxiong@kylinos.cn
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Yaxiong Tian 2026-02-04 09:54:01 +08:00 committed by Steven Rostedt (Google)
parent 0c2580a809
commit 2cdfe39dc9
1 changed files with 4 additions and 0 deletions
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4
kernel/trace/trace_kprobe.c
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@ -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;