Revert "Minor decoder optimizations, kernel fixes, cpu backend fixes"

src/xenia/base/mutex.h

@@ -25,7 +25,6 @@ namespace xe {
 */
 
 class alignas(4096) xe_global_mutex {
-	XE_MAYBE_UNUSED
   char detail[64];
 
  public:
@@ -39,7 +38,6 @@ class alignas(4096) xe_global_mutex {
 using global_mutex_type = xe_global_mutex;
 
 class alignas(64) xe_fast_mutex {
-	XE_MAYBE_UNUSED
   char detail[64];
 
  public:
@@ -64,6 +62,8 @@ class xe_unlikely_mutex {
   ~xe_unlikely_mutex() { mut = 0; }
 
   void lock() {
+    uint32_t lock_expected = 0;
+
     if (XE_LIKELY(_tryget())) {
       return;
     } else {