From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>,
Frank Rowand <frowand.list@gmail.com>,
Randy Dunlap <rdunlap@infradead.org>,
Namhyung Kim <namhyung@kernel.org>, Tim Bird <Tim.Bird@sony.com>,
Jiri Olsa <jolsa@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Tom Zanussi <tom.zanussi@linux.intel.com>,
Rob Herring <robh+dt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v6 12/22] tracing: kprobes: Register to dynevent earlier stage
Date: Sat, 11 Jan 2020 01:05:42 +0900 [thread overview]
Message-ID: <157867234213.17873.18039000024374948737.stgit@devnote2> (raw)
In-Reply-To: <157867220019.17873.13377985653744804396.stgit@devnote2>
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.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_kprobe.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 5899911a5720..5584405b899d 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -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;
next prev parent reply other threads:[~2020-01-10 16:05 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 16:03 [PATCH v6 00/22] tracing: bootconfig: Boot-time tracing and Extra boot config Masami Hiramatsu
2020-01-10 16:03 ` [PATCH v6 01/22] bootconfig: Add Extra Boot Config support Masami Hiramatsu
2020-01-18 18:33 ` Randy Dunlap
2020-01-19 12:23 ` Masami Hiramatsu
2020-01-10 16:03 ` [PATCH v6 02/22] bootconfig: Load boot config from the tail of initrd Masami Hiramatsu
2020-01-10 16:03 ` [PATCH v6 03/22] tools: bootconfig: Add bootconfig command Masami Hiramatsu
2020-01-10 16:04 ` [PATCH v6 04/22] tools: bootconfig: Add bootconfig test script Masami Hiramatsu
2020-01-10 16:04 ` [PATCH v6 05/22] proc: bootconfig: Add /proc/bootconfig to show boot config list Masami Hiramatsu
2020-01-10 16:04 ` [PATCH v6 06/22] init/main.c: Alloc initcall_command_line in do_initcall() and free it Masami Hiramatsu
2020-01-10 16:04 ` [PATCH v6 07/22] bootconfig: init: Allow admin to use bootconfig for kernel command line Masami Hiramatsu
2020-01-10 16:04 ` [PATCH v6 08/22] bootconfig: init: Allow admin to use bootconfig for init " Masami Hiramatsu
2020-02-07 18:03 ` Kees Cook
2020-02-07 19:31 ` Arvind Sankar
2020-02-07 19:46 ` Steven Rostedt
2020-02-08 0:44 ` Kees Cook
2020-08-02 2:33 ` Arvind Sankar
2020-08-03 15:03 ` Masami Hiramatsu
2020-08-03 15:29 ` Arvind Sankar
2020-08-03 17:22 ` Steven Rostedt
2020-08-04 0:29 ` Masami Hiramatsu
2020-01-10 16:05 ` [PATCH v6 09/22] Documentation: bootconfig: Add a doc for extended boot config Masami Hiramatsu
2020-01-18 18:28 ` Randy Dunlap
2020-01-19 13:36 ` Masami Hiramatsu
2020-01-10 16:05 ` [PATCH v6 10/22] tracing: Apply soft-disabled and filter to tracepoints printk Masami Hiramatsu
2020-01-10 16:05 ` [PATCH v6 11/22] tracing: kprobes: Output kprobe event to printk buffer Masami Hiramatsu
2020-01-10 16:05 ` Masami Hiramatsu [this message]
2020-01-10 16:05 ` [PATCH v6 13/22] tracing: Accept different type for synthetic event fields Masami Hiramatsu
2020-01-10 16:06 ` [PATCH v6 14/22] tracing: Add NULL trace-array check in print_synth_event() Masami Hiramatsu
2020-01-10 16:06 ` [PATCH v6 15/22] tracing/boot: Add boot-time tracing Masami Hiramatsu
2020-01-10 16:06 ` [PATCH v6 16/22] tracing/boot: Add per-event settings Masami Hiramatsu
2020-01-10 16:06 ` [PATCH v6 17/22] tracing/boot Add kprobe event support Masami Hiramatsu
2020-01-10 16:06 ` [PATCH v6 18/22] tracing/boot: Add synthetic " Masami Hiramatsu
2020-01-10 16:07 ` [PATCH v6 19/22] tracing/boot: Add instance node support Masami Hiramatsu
2020-01-10 16:07 ` [PATCH v6 20/22] tracing/boot: Add cpu_mask option support Masami Hiramatsu
2020-01-10 16:07 ` [PATCH v6 21/22] tracing/boot: Add function tracer filter options Masami Hiramatsu
2020-01-10 16:07 ` [PATCH v6 22/22] Documentation: tracing: Add boot-time tracing document Masami Hiramatsu
2020-01-18 18:14 ` Randy Dunlap
2020-01-19 14:15 ` Masami Hiramatsu
2020-01-19 14:20 ` [PATCH v6 00/22] tracing: bootconfig: Boot-time tracing and Extra boot config Masami Hiramatsu
2020-01-19 14:59 ` Steven Rostedt
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