From f7cea12b38a86e9b37fa5bc635310d3f85e5f8db Mon Sep 17 00:00:00 2001
From: kaashoek <kaashoek>
Date: Wed, 28 Jun 2006 16:44:41 +0000
Subject: disable interrupts when holding kernel lock

---
 spinlock.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'spinlock.c')

diff --git a/spinlock.c b/spinlock.c
index 911ecf8..5cbe062 100644
--- a/spinlock.c
+++ b/spinlock.c
@@ -14,6 +14,8 @@ acquire_spinlock(uint32_t* lock)
 
   if (*lock == cpu_id)
     return;
+  
+  lapic_disableintr();
   while ( cmpxchg(LOCK_FREE, cpu_id, lock) != cpu_id ) { ; }
   // cprintf ("acquired: %d\n", cpu_id);
 }
@@ -26,6 +28,7 @@ release_spinlock(uint32_t* lock)
   if (*lock != cpu_id)
     panic("release_spinlock: releasing a lock that i don't own\n");
   *lock = LOCK_FREE;
+  lapic_enableintr();
 }
 
 void
-- 
cgit v1.2.3