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tracing: Account for variables in named trigger compatibility

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Named triggers must also have the same set of variables in order to be
considered compatible - update the trigger match test to account for
that.

The reason for this requirement is that named triggers with variables
are meant to allow one or more events to set the same variable.

Link: http://lkml.kernel.org/r/a17eae6328a99917f9d5c66129c9fcd355279ee9.1516069914.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2018-01-15 20:51:50 -06:00 committed by Steven Rostedt (VMware)
parent 30350d65ac
commit 1a361dfcf2
1 changed files with 6 additions and 1 deletions
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7
kernel/trace/trace_events_hist.c
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@ -1610,7 +1610,7 @@ static int event_hist_trigger_print(struct seq_file *m,
sort_key = &hist_data->sort_keys[i];
idx = sort_key->field_idx;
if (WARN_ON(idx >= TRACING_MAP_FIELDS_MAX))
if (WARN_ON(idx >= HIST_FIELDS_MAX))
return -EINVAL;
if (i > 0)
@ -1798,6 +1798,11 @@ static bool hist_trigger_match(struct event_trigger_data *data,
return false;
if (key_field->is_signed != key_field_test->is_signed)
return false;
if (!!key_field->var.name != !!key_field_test->var.name)
return false;
if (key_field->var.name &&
strcmp(key_field->var.name, key_field_test->var.name) != 0)
return false;
}
for (i = 0; i < hist_data->n_sort_keys; i++) {