Remove unnecessary optimization barrier.

The compiler can't optimize out the load of "ticks" here because
it can't look into intr_disable() and intr_set_level() and know that
they don't modify "ticks".

Thanks to Martin <mfleener@stanford.edu> for pointing this out.

diff --git a/src/devices/timer.c b/src/devices/timer.c
index c97667f56bfcd5d9bd70862c7ff3ca2047f8f706..befaaaed5a9a1ac0cd25ab76f8afd96fe6865127 100644 (file)
--- a/src/devices/timer.c
+++ b/src/devices/timer.c
@@ -73,7 +73,6 @@ timer_ticks (void)
   enum intr_level old_level = intr_disable ();
   int64_t t = ticks;
   intr_set_level (old_level);
-  barrier ();
   return t;
 }