From 5e047d6b9648f2f52f53509d49d5a9a2495c5cdb Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Fri, 26 Aug 2011 03:11:58 -0700
Subject: [PATCH] bug in ticket lock! => switch (temporary) to a "normal"
 spinlock

---
 include/metalsvm/spinlock.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/metalsvm/spinlock.h b/include/metalsvm/spinlock.h
index 50909bf8..af4a973d 100644
--- a/include/metalsvm/spinlock.h
+++ b/include/metalsvm/spinlock.h
@@ -92,12 +92,16 @@ inline static int spinlock_lock(spinlock_t* s) {
 		return 0;
 	}
 
+#if 0
 	ticket = atomic_int32_inc(&s->queue);
 	while(atomic_int32_read(&s->dequeue) != ticket) {
 		NOP1;
 	}
 	s->owner = curr_task->id;
 	s->counter = 1;
+#else
+	while( atomic_int32_test_and_set(&s->dequeue,0) );
+#endif
 
 	return 0;
 }
@@ -114,7 +118,11 @@ inline static int spinlock_unlock(spinlock_t* s) {
 	s->counter--;
 	if (!s->counter) {
 		s->owner = MAX_TASKS;
+#if 0
 		atomic_int32_inc(&s->dequeue);
+#else
+		atomic_int32_set(&s->dequeue,1);
+#endif
 	}
 
 	return 0;