btrfs_init_free_ino_ctl 1474 fs/btrfs/disk-io.c 	btrfs_init_free_ino_ctl(root);
btrfs_init_free_ino_ctl    6 fs/btrfs/inode-map.h void btrfs_init_free_ino_ctl(struct btrfs_root *root);