Merge perch.ndb.mysql.com:/home/jonas/src/50-work

into  perch.ndb.mysql.com:/home/jonas/src/51-work

sql/log.cc

@@ -2261,13 +2261,18 @@ shutdown the MySQL server and restart it.", name, errno);
 int MYSQL_BIN_LOG::get_current_log(LOG_INFO* linfo)
 {
   pthread_mutex_lock(&LOCK_log);
+  int ret = raw_get_current_log(linfo);
+  pthread_mutex_unlock(&LOCK_log);
+  return ret;
+}
+
+int MYSQL_LOG::raw_get_current_log(LOG_INFO* linfo)
+{
   strmake(linfo->log_file_name, log_file_name, sizeof(linfo->log_file_name)-1);
   linfo->pos = my_b_tell(&log_file);
-  pthread_mutex_unlock(&LOCK_log);
   return 0;
 }
 
-
 /*
   Move all data up in a file in an filename index file
 

sql/sql_repl.cc

@@ -1506,10 +1506,14 @@ bool show_binlogs(THD* thd)
   if (protocol->send_fields(&field_list,
                             Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
     DBUG_RETURN(TRUE);
+  
+  pthread_mutex_lock(mysql_bin_log.get_log_lock());
   mysql_bin_log.lock_index();
   index_file=mysql_bin_log.get_index_file();
   
-  mysql_bin_log.get_current_log(&cur);
+  mysql_bin_log.raw_get_current_log(&cur); // dont take mutex
+  pthread_mutex_unlock(mysql_bin_log.get_log_lock()); // lockdep, OK
+  
   cur_dir_len= dirname_length(cur.log_file_name);
 
   reinit_io_cache(index_file, READ_CACHE, (my_off_t) 0, 0, 0);