From: Uladzislau Rezki (Sony) <urezki@gmail.com>
Date: Wed, 24 Nov 2021 11:03:08 +0000 (+0100)
Subject: tracing: Switch to kvfree_rcu() API
X-Git-Tag: baikal/mips/sdk6.1~6631^2~37
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=322a7a18df241e4d2fcb6ed8b76356a18dc61b53;p=kernel.git

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>
---

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 7520d43aed554..4719a848bf174 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -138,8 +138,7 @@ static void osnoise_unregister_instance(struct trace_array *tr)
 	if (!found)
 		return;
 
-	synchronize_rcu();
-	kfree(inst);
+	kvfree_rcu(inst);
 }
 
 /*
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 3ed2a3f372972..8a3822818bf88 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -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);