diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-12-13 04:05:10 +0300 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-12-15 18:16:50 +0300 |
| commit | 5f893b2639b21ffe6834b1aebba392c37d2b83f9 (patch) | |
| tree | aff7db6baf3dd393a4791f2106ebacbe02b1ae5b /kernel/trace/trace.h | |
| parent | aee4e5f3d3abb7a2239dd02f6d8fb173413fd02f (diff) | |
| download | linux-5f893b2639b21ffe6834b1aebba392c37d2b83f9.tar.xz | |
tracing: Move enabling tracepoints to just after rcu_init()
Enabling tracepoints at boot up can be very useful. The tracepoint
can be initialized right after RCU has been. There's no need to
wait for the early_initcall() to be called. That's too late for some
things that can use tracepoints for debugging. Move the logic to
enable tracepoints out of the initcalls and into init/main.c to
right after rcu_init().
This also allows trace_printk() to be used early too.
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412121539300.16494@nanos
Link: http://lkml.kernel.org/r/20141214164104.307127356@goodmis.org
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 3255dfb054a0..c138c149d6ef 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1301,4 +1301,17 @@ int perf_ftrace_event_register(struct ftrace_event_call *call, #define perf_ftrace_event_register NULL #endif +#ifdef CONFIG_FTRACE_SYSCALLS +void init_ftrace_syscalls(void); +#else +static inline void init_ftrace_syscalls(void) { } +#endif + +#ifdef CONFIG_EVENT_TRACING +void trace_event_init(void); +#else +static inline void __init trace_event_init(void) { } +#endif + + #endif /* _LINUX_KERNEL_TRACE_H */ |