1 files changed, 3 insertions, 2 deletions

diff --git a/threads/synch.c b/threads/synch.c
index 364b769..db204f5 100644
--- a/threads/synch.c
+++ b/threads/synch.c
@@ -233,8 +233,9 @@ lock_acquire (struct lock *lock)
   if (lock->holder != NULL)
     cur->blocked_lock = lock;
 
-  /* nested priority donation: we loop backwards: lock -> holder -> blocked_lock
-     and donate our priority */
+  /* nested priority donation:
+     we need to loop backwards: lock -> holder -> blocked_lock
+     our first iteration is the generic (not nested) priority donation case */
   blocked_lock = lock;
   while (blocked_lock != NULL && blocked_lock->holder != NULL)
     {