diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-09-10 21:39:17 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-09-21 21:06:04 -0400 |
| commit | ba0fbfbb21cd90d51e4f6668ee8397e810818028 (patch) | |
| tree | 0ee53dc044e64ea5d4a608025aaf130be718de46 /kernel/trace/trace_events_synth.c | |
| parent | 4114fbfd02f12d7a58cc4bd6fc36e0925266f9f7 (diff) | |
tracing/boot, kprobe, synth: Initialize boot-time tracing earlier
Initialize boot-time tracing in core_initcall_sync instead of
fs_initcall, and initialize required tracers (kprobes and synth)
in core_initcall. This will allow the boot-time tracing to trace
__init code from the beginning of postcore_initcall stage.
Link: https://lkml.kernel.org/r/159974155727.478751.7486926132902849578.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_synth.c')
| -rw-r--r-- | kernel/trace/trace_events_synth.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c index 7c765e80e974..a9cd7793f7ea 100644 --- a/kernel/trace/trace_events_synth.c +++ b/kernel/trace/trace_events_synth.c @@ -1754,17 +1754,26 @@ static const struct file_operations synth_events_fops = { .release = seq_release, }; -static __init int trace_events_synth_init(void) +/* + * Register dynevent at core_initcall. This allows kernel to setup kprobe + * events in postcore_initcall without tracefs. + */ +static __init int trace_events_synth_init_early(void) { - struct dentry *entry = NULL; int err = 0; err = dyn_event_register(&synth_event_ops); - if (err) { + if (err) pr_warn("Could not register synth_event_ops\n"); - return err; - } + return err; +} +core_initcall(trace_events_synth_init_early); + +static __init int trace_events_synth_init(void) +{ + struct dentry *entry = NULL; + int err = 0; err = tracing_init_dentry(); if (err) goto err; |