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| author | Steven Rostedt <srostedt@redhat.com> | 2012-10-05 18:13:07 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-10-31 21:45:24 +0100 |
| commit | 6f4156723c084bfc0c0f72205c541fafb8ad3ded (patch) | |
| tree | 1852fb096d1f45a6d826480b41f9d7eb292c4e8a | |
| parent | tracing: Replace strict_strto* with kstrto* (diff) | |
| download | linux-6f4156723c084bfc0c0f72205c541fafb8ad3ded.tar.xz linux-6f4156723c084bfc0c0f72205c541fafb8ad3ded.zip | |
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>
| -rw-r--r-- | kernel/trace/ftrace.c | 4 | ||||
| -rw-r--r-- | kernel/trace/trace_branch.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_functions.c | 3 | ||||
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_irqsoff.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_sched_wakeup.c | 2 |
6 files changed, 7 insertions, 8 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 60ad606dc85f..4451aa3a55a0 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) { } diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index 8d3538b4ea5f..bd3e0eef4eaa 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -199,7 +199,7 @@ __init static int init_branch_tracer(void) } return register_tracer(&branch_trace); } -device_initcall(init_branch_tracer); +core_initcall(init_branch_tracer); #else static inline diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index 618dcf8bdb87..bb227e380cb5 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -411,5 +411,4 @@ static __init int init_function_trace(void) init_func_cmd_traceon(); return register_tracer(&function_trace); } -device_initcall(init_function_trace); - +core_initcall(init_function_trace); diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 99b4378393d5..a84b55879bc4 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -1474,4 +1474,4 @@ static __init int init_graph_trace(void) return register_tracer(&graph_trace); } -device_initcall(init_graph_trace); +core_initcall(init_graph_trace); diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index d98ee8283b29..11edebda4548 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -698,4 +698,4 @@ __init static int init_irqsoff_tracer(void) return 0; } -device_initcall(init_irqsoff_tracer); +core_initcall(init_irqsoff_tracer); diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c index 02170c00c413..2f6af7833694 100644 --- a/kernel/trace/trace_sched_wakeup.c +++ b/kernel/trace/trace_sched_wakeup.c @@ -637,4 +637,4 @@ __init static int init_wakeup_tracer(void) return 0; } -device_initcall(init_wakeup_tracer); +core_initcall(init_wakeup_tracer); |