To the best of my knowledge this is dead code that no one cares about.
+source "fs/crypto/Kconfig"
+
source "fs/notify/Kconfig"
source "fs/quota/Kconfig"
if MISC_FILESYSTEMS
+source "fs/orangefs/Kconfig"
source "fs/adfs/Kconfig"
source "fs/affs/Kconfig"
source "fs/ecryptfs/Kconfig"