Cleanups

- Remove not used thd_rpl_is_parallel()
- Remove not used mysql_notify_thread_having_shared_lock()
- Remove not needed LOCK_thread_count from MYSQL_BIN_LOG::reset_logs()
  - LOCK_thread_count is not protecting against rollback, so this
    code and comment is not needed
- Remove mutex_locks in slave.cc that are not needed.
  Added THD::assert_not_linked() to ensure that it was safe to remove
- Fixed not repeatable test load_data_stmt_view
- Updated binlog_killed to test removal of mutex
  (thanks to Andrei Elkin for test)
- More code comments

1 files changed, 4 insertions, 0 deletions

diff --git a/sql/sql_list.h b/sql/sql_list.h
index 422b7943aa9..c708ed6d2f9 100644
--- a/sql/sql_list.h
+++ b/sql/sql_list.h
@@ -622,6 +622,10 @@ struct ilink
   {
     DBUG_ASSERT(prev != 0 && next != 0);
   }
+  inline void assert_not_linked()
+  {
+    DBUG_ASSERT(prev == 0 && next == 0);
+  }
   virtual ~ilink() { unlink(); }		/*lint -e1740 */
 };