From 11ea9b090c102774ca2dcd6ef3eb2c5a468d7edd Mon Sep 17 00:00:00 2001
From: Ben Gamari <bgamari.foss@gmail.com>
Date: Sun, 7 Jul 2013 13:54:19 -0400
Subject: [PATCH] sync: Add comment

---
 lib/cm3/sync.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/cm3/sync.c b/lib/cm3/sync.c
index 20c01960..9257d397 100644
--- a/lib/cm3/sync.c
+++ b/lib/cm3/sync.c
@@ -59,6 +59,7 @@ void mutex_lock(mutex_t *m)
 
 void mutex_unlock(mutex_t *m)
 {
+        /* Ensure accesses to protected resource are finished */
 	__dmb();
 
 	/* Free the lock. */