diff --git a/kernel/marker.c b/kernel/marker.c
index 48a4ea5..ccae1d1 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -104,9 +104,9 @@
 	char ptype;
 
 	/*
-	 * disabling preemption to make sure the teardown of the callbacks can
-	 * be done correctly when they are in modules and they insure RCU read
-	 * coherency.
+	 * preempt_disable does two things : disabling preemption to make sure
+	 * the teardown of the callbacks can be done correctly when they are in
+	 * modules and they insure RCU read coherency.
 	 */
 	preempt_disable();
 	ptype = ACCESS_ONCE(mdata->ptype);
@@ -551,9 +551,9 @@
 
 /*
  * Disable a marker and its probe callback.
- * Note: only after a synchronize_sched() issued after setting elem->call to the
- * empty function insures that the original callback is not used anymore. This
- * insured by preemption disabling around the call site.
+ * Note: only waiting an RCU period after setting elem->call to the empty
+ * function insures that the original callback is not used anymore. This insured
+ * by preempt_disable around the call site.
  */
 static void disable_marker(struct marker *elem)
 {
@@ -565,8 +565,8 @@
 	elem->ptype = 0;	/* single probe */
 	/*
 	 * Leave the private data and id there, because removal is racy and
-	 * should be done only after a synchronize_sched(). These are never used
-	 * until the next initialization anyway.
+	 * should be done only after an RCU period. These are never used until
+	 * the next initialization anyway.
 	 */
 }
 
@@ -601,9 +601,6 @@
 
 /*
  * Update probes, removing the faulty probes.
- * Issues a synchronize_sched() when no reference to the module passed
- * as parameter is found in the probes so the probe module can be
- * safely unloaded from now on.
  *
  * Internal callback only changed before the first probe is connected to it.
  * Single probe private data can only be changed on 0 -> 1 and 2 -> 1