1 files changed, 1 insertions, 1 deletions
diff --git a/spinlock.c b/spinlock.c
index 68cfbe9..281748a 100644
--- a/spinlock.c
+++ b/spinlock.c
@@ -23,7 +23,7 @@ initlock(struct spinlock *lk, char *name)
 void
 acquire(struct spinlock *lk)
 {
-  pushcli();
+  pushcli(); // disable interrupts to avoid deadlock.
   if(holding(lk))
     panic("acquire");