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| author | Tom Zanussi <tom.zanussi@linux.intel.com> | 2015-11-23 13:51:16 -0600 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2015-11-25 15:24:14 -0500 |
| commit | 4e4a4d75700da67c1209c151d5f11a309c3b8367 (patch) | |
| tree | 309c7eab5564fb8fdddcc217e2590764c929f29d /kernel/trace/trace_events_trigger.c | |
| parent | 4239c38fe0b3847e1e6d962c74b41b08ba0e2990 (diff) | |
| download | linux-4e4a4d75700da67c1209c151d5f11a309c3b8367.tar.bz2 | |
tracing: Update cond flag when enabling or disabling a trigger
When a trigger is enabled, the cond flag should be set beforehand,
otherwise a trigger that's expecting to process a trace record
(e.g. one with post_trigger set) could be invoked without one.
Likewise a trigger's cond flag should be reset after it's disabled,
not before.
Link: http://lkml.kernel.org/r/a420b52a67b1c2d3cab017914362d153255acb99.1448303214.git.tom.zanussi@linux.intel.com
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events_trigger.c')
| -rw-r--r-- | kernel/trace/trace_events_trigger.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index 42a4009fd75a..4d2f3ccc56f6 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -543,11 +543,12 @@ static int register_trigger(char *glob, struct event_trigger_ops *ops, list_add_rcu(&data->list, &file->triggers); ret++; + update_cond_flag(file); if (trace_event_trigger_enable_disable(file, 1) < 0) { list_del_rcu(&data->list); + update_cond_flag(file); ret--; } - update_cond_flag(file); out: return ret; } @@ -575,8 +576,8 @@ static void unregister_trigger(char *glob, struct event_trigger_ops *ops, if (data->cmd_ops->trigger_type == test->cmd_ops->trigger_type) { unregistered = true; list_del_rcu(&data->list); - update_cond_flag(file); trace_event_trigger_enable_disable(file, 0); + update_cond_flag(file); break; } } @@ -1319,11 +1320,12 @@ static int event_enable_register_trigger(char *glob, list_add_rcu(&data->list, &file->triggers); ret++; + update_cond_flag(file); if (trace_event_trigger_enable_disable(file, 1) < 0) { list_del_rcu(&data->list); + update_cond_flag(file); ret--; } - update_cond_flag(file); out: return ret; } @@ -1344,8 +1346,8 @@ static void event_enable_unregister_trigger(char *glob, (enable_data->file == test_enable_data->file)) { unregistered = true; list_del_rcu(&data->list); - update_cond_flag(file); trace_event_trigger_enable_disable(file, 0); + update_cond_flag(file); break; } } |