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Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core

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Pull ftrace robustization fixes from Steve Rostedt.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2012-06-18 10:57:51 +02:00
parent e227051b13 7374e82771
commit 4983955c04
3 changed files with 6 additions and 7 deletions
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3
include/linux/ftrace_event.h
View file

@ -207,6 +207,9 @@ struct ftrace_event_call {
* bit 1: enabled * bit 1: enabled
* bit 2: filter_active * bit 2: filter_active
* bit 3: enabled cmd record * bit 3: enabled cmd record
* bit 4: allow trace by non root (cap any)
* bit 5: failed to apply filter
* bit 6: ftrace internal event (do not enable)
* *
* Changes to flags must hold the event_mutex. * Changes to flags must hold the event_mutex.
* *

8
kernel/trace/ftrace.c
View file

@ -312,7 +312,7 @@ static int remove_ftrace_list_ops(struct ftrace_ops **list,
static int __register_ftrace_function(struct ftrace_ops *ops) static int __register_ftrace_function(struct ftrace_ops *ops)
{ {
if (ftrace_disabled) if (unlikely(ftrace_disabled))
return -ENODEV; return -ENODEV;
if (FTRACE_WARN_ON(ops == &global_ops)) if (FTRACE_WARN_ON(ops == &global_ops))
@ -4299,16 +4299,12 @@ int register_ftrace_function(struct ftrace_ops *ops)
mutex_lock(&ftrace_lock); mutex_lock(&ftrace_lock);
if (unlikely(ftrace_disabled))
goto out_unlock;
ret = __register_ftrace_function(ops); ret = __register_ftrace_function(ops);
if (!ret) if (!ret)
ret = ftrace_startup(ops, 0); ret = ftrace_startup(ops, 0);
out_unlock:
mutex_unlock(&ftrace_lock); mutex_unlock(&ftrace_lock);
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(register_ftrace_function); EXPORT_SYMBOL_GPL(register_ftrace_function);

2
kernel/trace/trace_output.c
View file

@ -1325,4 +1325,4 @@ __init static int init_events(void)
return 0; return 0;
} }
device_initcall(init_events); early_initcall(init_events);