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tracing: Switch to kvfree_rcu() API

Browse source 
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>
This commit is contained in:
Uladzislau Rezki (Sony) 2021-11-24 12:03:08 +01:00 committed by Steven Rostedt (VMware)
parent 1d83c3a20b
commit a6ed2aee54
2 changed files with 2 additions and 4 deletions
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3
kernel/trace/trace_osnoise.c
View file

@ -138,8 +138,7 @@ static void osnoise_unregister_instance(struct trace_array *tr)
if (!found)
return;
synchronize_rcu();
kfree(inst);
kvfree_rcu(inst);
}
/*

3
kernel/trace/trace_probe.c
View file

@ -1138,8 +1138,7 @@ int trace_probe_remove_file(struct trace_probe *tp,
return -ENOENT;
list_del_rcu(&link->list);
synchronize_rcu();
kfree(link);
kvfree_rcu(link);
if (list_empty(&tp->event->files))
trace_probe_clear_flag(tp, TP_FLAG_TRACE);