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authorLi Zefan <lizf@cn.fujitsu.com>2011-11-01 09:09:35 +0800
committerSteven Rostedt <rostedt@goodmis.org>2011-11-02 13:56:25 -0400
commited0449af5373abd766c79fbf83254bebc996bd23 (patch)
treee72b0cde1827e4558c8748e7a410086ba124ef7f /kernel/trace
parentd631097577f6fe027f4903f62eabced6445d19bf (diff)
downloadop-kernel-dev-ed0449af5373abd766c79fbf83254bebc996bd23.zip
op-kernel-dev-ed0449af5373abd766c79fbf83254bebc996bd23.tar.gz
tracing: Restore system filter behavior
Though not all events have field 'prev_pid', it was allowed to do this: # echo 'prev_pid == 100' > events/sched/filter but commit 75b8e98263fdb0bfbdeba60d4db463259f1fe8a2 (tracing/filter: Swap entire filter of events) broke it without any reason. Link: http://lkml.kernel.org/r/4EAF46CF.8040408@cn.fujitsu.com Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_events_filter.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 816d3d0..86040d9 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1649,7 +1649,9 @@ static int replace_system_preds(struct event_subsystem *system,
*/
err = replace_preds(call, NULL, ps, filter_string, true);
if (err)
- goto fail;
+ call->flags |= TRACE_EVENT_FL_NO_SET_FILTER;
+ else
+ call->flags &= ~TRACE_EVENT_FL_NO_SET_FILTER;
}
list_for_each_entry(call, &ftrace_events, list) {
@@ -1658,6 +1660,9 @@ static int replace_system_preds(struct event_subsystem *system,
if (strcmp(call->class->system, system->name) != 0)
continue;
+ if (call->flags & TRACE_EVENT_FL_NO_SET_FILTER)
+ continue;
+
filter_item = kzalloc(sizeof(*filter_item), GFP_KERNEL);
if (!filter_item)
goto fail_mem;
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