Commit a6ed2aee authored Nov 24, 2021 by Uladzislau Rezki (Sony) Committed by Steven Rostedt (VMware) Dec 06, 2021

tracing: Switch to kvfree_rcu() API

Instead of invoking a synchronize_rcu() to free a pointer
after a grace period we can directly make use of new API
that does the same but in more efficient way.

Link: https://lkml.kernel.org/r/20211124110308.2053-10-urezki@gmail.com



Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent 1d83c3a2

kernel/trace/trace_osnoise.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -138,8 +138,7 @@ static void osnoise_unregister_instance(struct trace_array *tr)
	if (!found)		if (!found)
	return;		return;

	synchronize_rcu();		kvfree_rcu(inst);
	kfree(inst);
	}		}

	/*		/*

kernel/trace/trace_probe.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1138,8 +1138,7 @@ int trace_probe_remove_file(struct trace_probe *tp,
	return -ENOENT;		return -ENOENT;

	list_del_rcu(&link->list);		list_del_rcu(&link->list);
	synchronize_rcu();		kvfree_rcu(link);
	kfree(link);

	if (list_empty(&tp->event->files))		if (list_empty(&tp->event->files))
	trace_probe_clear_flag(tp, TP_FLAG_TRACE);		trace_probe_clear_flag(tp, TP_FLAG_TRACE);