Merge from mysql-5.1 to mysql-5.5.

storage/innobase/sync/sync0arr.c

@@ -945,6 +945,8 @@ sync_array_print_long_waits(
 # define SYNC_ARRAY_TIMEOUT	240
 #endif
 
+	sync_array_enter(sync_primary_wait_array);
+
 	for (i = 0; i < sync_primary_wait_array->n_cells; i++) {
 
 		double	diff;
@@ -979,6 +981,8 @@ sync_array_print_long_waits(
 		}
 	}
 
+	sync_array_exit(sync_primary_wait_array);
+
 	if (noticed) {
 		fprintf(stderr,
 			"InnoDB: ###### Starts InnoDB Monitor"