From b5ad384e79add1d87fff54070000dadcf218ffab Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= Date: Tue, 23 Sep 2008 11:34:32 +0100 Subject: [PATCH] tracing/ftrace: make tracing suitable to run the boot tracer The tracing engine have now to be init in early_initcall to set the boot tracer. Only the debugfs settings will be initialized at fs_initcall time. Signed-off-by: Frederic Weisbecker Signed-off-by: Ingo Molnar --- kernel/trace/trace.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index f2ef72fa3f17..6ada059832a6 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2990,7 +2990,7 @@ struct dentry *tracing_init_dentry(void) #include "trace_selftest.c" #endif -static __init void tracer_init_debugfs(void) +static __init int tracer_init_debugfs(void) { struct dentry *d_tracer; struct dentry *entry; @@ -3078,6 +3078,7 @@ static __init void tracer_init_debugfs(void) #ifdef CONFIG_SYSPROF_TRACER init_tracer_sysprof_debugfs(d_tracer); #endif + return 0; } int trace_vprintk(unsigned long ip, const char *fmt, va_list args) @@ -3504,17 +3505,20 @@ __init static int tracer_alloc_buffers(void) pages, trace_nr_entries, (long)TRACE_ENTRY_SIZE); pr_info(" actual entries %ld\n", global_trace.entries); - tracer_init_debugfs(); - trace_init_cmdlines(); register_tracer(&nop_trace); +#ifdef CONFIG_BOOT_TRACER + register_tracer(&boot_tracer); + current_trace = &boot_tracer; + current_trace->init(&global_trace); +#else current_trace = &nop_trace; +#endif /* All seems OK, enable tracing */ global_trace.ctrl = tracer_enabled; tracing_disabled = 0; - atomic_notifier_chain_register(&panic_notifier_list, &trace_panic_notifier); @@ -3548,4 +3552,5 @@ __init static int tracer_alloc_buffers(void) } return ret; } -fs_initcall(tracer_alloc_buffers); +early_initcall(tracer_alloc_buffers); +fs_initcall(tracer_init_debugfs);