sim: Make the drain state a global typed enum

The drain state enum is currently a part of the Drainable
interface. The same state machine will be used by the DrainManager to
identify the global state of the simulator. Make the drain state a
global typed enum to better cater for this usage scenario.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cpu/o3/cpu.hh b/src/cpu/o3/cpu.hh
index bbc9fde8e..44400542a 100644
--- a/src/cpu/o3/cpu.hh
+++ b/src/cpu/o3/cpu.hh
@@ -336,7 +336,7 @@ class FullO3CPU : public BaseO3CPU
     void updateThreadPriority();
 
     /** Is the CPU draining? */
-    bool isDraining() const { return getDrainState() == Drainable::Draining; }
+    bool isDraining() const { return getDrainState() == DrainState::Draining; }
 
     void serializeThread(CheckpointOut &cp,
                          ThreadID tid) const M5_ATTR_OVERRIDE;