EXT4_MOUNT_DISCARD 1693 fs/ext4/super.c 	{Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET},
EXT4_MOUNT_DISCARD 1694 fs/ext4/super.c 	{Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR},