tracing: filter fix for TRACE_EVENT_FORMAT events
Impact: fix crash (hang) when using TRACE_EVENT_FORMAT filter files filters are only hooked up to the tracepoint events defined using TRACE_EVENT but not the tracers that use TRACE_EVENT_FORMAT, such as ftrace. Do not display the filter files at all for TRACE_EVENT_FORMAT events for the time being. Cc: Steven Rostedt <rostedt@goodmis.org> Cc: =?ISO-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com> LKML-Reference: <1237878882.8339.61.camel@charm-linux> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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9a8118baae
1 changed files with 5 additions and 13 deletions
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@ -680,7 +680,6 @@ static struct dentry *
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event_subsystem_dir(const char *name, struct dentry *d_events)
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{
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struct event_subsystem *system;
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struct dentry *entry;
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/* First see if we did not already create this dir */
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list_for_each_entry(system, &event_subsystems, list) {
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@ -709,12 +708,6 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
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system->preds = NULL;
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entry = debugfs_create_file("filter", 0644, system->entry, system,
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&ftrace_subsystem_filter_fops);
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if (!entry)
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pr_warning("Could not create debugfs "
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"'%s/filter' entry\n", name);
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return system->entry;
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}
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@ -770,13 +763,12 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events)
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" events/%s\n", call->name);
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return ret;
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}
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}
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entry = debugfs_create_file("filter", 0644, call->dir, call,
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&ftrace_event_filter_fops);
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if (!entry)
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pr_warning("Could not create debugfs "
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"'%s/filter' entry\n", call->name);
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}
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/* A trace may not want to export its format */
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if (!call->show_format)
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