diff options
author | Steven Rostedt <srostedt@redhat.com> | 2012-10-05 16:13:07 (GMT) |
---|---|---|
committer | Steven Rostedt <rostedt@goodmis.org> | 2012-10-31 20:45:24 (GMT) |
commit | 6f4156723c084bfc0c0f72205c541fafb8ad3ded (patch) | |
tree | 1852fb096d1f45a6d826480b41f9d7eb292c4e8a /kernel/trace/ftrace.c | |
parent | bcd83ea6cbfee54e33d1527b87538dc99ca2137b (diff) | |
download | linux-fsl-qoriq-6f4156723c084bfc0c0f72205c541fafb8ad3ded.tar.xz |
tracing: Allow tracers to start at core initcall
There's times during debugging that it is helpful to see traces of early
boot functions. But the tracers are initialized at device_initcall()
which is quite late during the boot process. Setting the kernel command
line parameter ftrace=function will not show anything until the function
tracer is initialized. This prevents being able to trace functions before
device_initcall().
There's no reason that the tracers need to be initialized so late in the
boot process. Move them up to core_initcall() as they still need to come
after early_initcall() which initializes the tracing buffers.
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r-- | kernel/trace/ftrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 60ad606..4451aa3 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2868,7 +2868,7 @@ static int __init ftrace_mod_cmd_init(void) { return register_ftrace_command(&ftrace_mod_cmd); } -device_initcall(ftrace_mod_cmd_init); +core_initcall(ftrace_mod_cmd_init); static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct pt_regs *pt_regs) @@ -4055,7 +4055,7 @@ static int __init ftrace_nodyn_init(void) ftrace_enabled = 1; return 0; } -device_initcall(ftrace_nodyn_init); +core_initcall(ftrace_nodyn_init); static inline int ftrace_init_dyn_debugfs(struct dentry *d_tracer) { return 0; } static inline void ftrace_startup_enable(int command) { } |