[PATCH] tracing/filters: Fix to make system filter work

[Li Zefan]

commit fce29d15b59245597f7f320db4a9f2be0f5fb512
("tracing/filters: Refactor subsystem filter code")
broke system filter accidentally.

Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
 kernel/trace/trace_events_filter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 21d3475..50504cb 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1230,12 +1230,12 @@ static int replace_system_preds(struct event_subsystem *system,
 				struct filter_parse_state *ps,
 				char *filter_string)
 {
-	struct event_filter *filter = system->filter;
 	struct ftrace_event_call *call;
 	bool fail = true;
 	int err;
 
 	list_for_each_entry(call, &ftrace_events, list) {
+		struct event_filter *filter = call->filter;
 
 		if (!call->define_fields)
 			continue;
-- 
1.6.3

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