fix botch: use the FIDC_LOOKUP_LOCK flag to protect race conditions against certain accesses that modify flags
fix botch: use the FIDC_LOOKUP_LOCK flag to protect race conditions against certain accesses that modify flags

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable