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tracing/ftrace: make tracing suitable to run the boot tracer

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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 <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frédéric Weisbecker 2008-09-23 11:34:32 +01:00 committed by Ingo Molnar
parent d13744cd6e
commit b5ad384e79
1 changed files with 10 additions and 5 deletions
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15
kernel/trace/trace.c
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@ -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);