fgragh: No need to invoke the function call_filter_check_discard()

The function call_filter_check_discard() has been removed in the
commit 49e4154 ("tracing: Remove TRACE_EVENT_FL_FILTERED logic"),
from another topic branch. But when merged together with commit
21e9280 ("function_graph: Support recording and printing the
function return address") which added another call to
call_filter_check_discard(), it caused the build to fail. Since the
function call_filter_check_discard() is useless, it can simply be removed
regardless of being merged with commit 49e4154 or not.

Link: https://lore.kernel.org/all/[email protected]/

Cc: Masami Hiramatsu <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Donglin Peng <[email protected]>
Link: https://lore.kernel.org/[email protected]
Reported-by: Stephen Rothwell <[email protected]>
Fixes: 21e9280 ("function_graph: Support recording and printing the function return address")
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: rostedt

kernel/trace/trace_functions_graph.c

@@ -137,7 +137,6 @@ int __trace_graph_retaddr_entry(struct trace_array *tr,
 				unsigned int trace_ctx,
 				unsigned long retaddr)
 {
-	struct trace_event_call *call = &event_fgraph_retaddr_entry;
 	struct ring_buffer_event *event;
 	struct trace_buffer *buffer = tr->array_buffer.buffer;
 	struct fgraph_retaddr_ent_entry *entry;
@@ -150,8 +149,7 @@ int __trace_graph_retaddr_entry(struct trace_array *tr,
 	entry->graph_ent.func = trace->func;
 	entry->graph_ent.depth = trace->depth;
 	entry->graph_ent.retaddr = retaddr;
-	if (!call_filter_check_discard(call, entry, buffer, event))
-		trace_buffer_unlock_commit_nostack(buffer, event);
+	trace_buffer_unlock_commit_nostack(buffer, event);
 
 	return 1;
 }