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tracing: kprobes: Register to dynevent earlier stage

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Register kprobe event to dynevent in subsys_initcall level.
This will allow kernel to register new kprobe events in
fs_initcall level via trace_run_command.

Link: http://lkml.kernel.org/r/157867234213.17873.18039000024374948737.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2020-01-11 01:05:42 +09:00 committed by Steven Rostedt (VMware)
parent 8cfcf15503
commit d8d4c6d0e7
1 changed files with 15 additions and 4 deletions
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19
kernel/trace/trace_kprobe.c
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@ -1685,11 +1685,12 @@ static __init void setup_boot_kprobe_events(void)
enable_boot_kprobe_events();
}
/* Make a tracefs interface for controlling probe points */
static __init int init_kprobe_trace(void)
/*
* Register dynevent at subsys_initcall. This allows kernel to setup kprobe
* events in fs_initcall without tracefs.
*/
static __init int init_kprobe_trace_early(void)
{
struct dentry *d_tracer;
struct dentry *entry;
int ret;
ret = dyn_event_register(&trace_kprobe_ops);
@ -1699,6 +1700,16 @@ static __init int init_kprobe_trace(void)
if (register_module_notifier(&trace_kprobe_module_nb))
return -EINVAL;
return 0;
}
subsys_initcall(init_kprobe_trace_early);
/* Make a tracefs interface for controlling probe points */
static __init int init_kprobe_trace(void)
{
struct dentry *d_tracer;
struct dentry *entry;
d_tracer = tracing_init_dentry();
if (IS_ERR(d_tracer))
return 0;