btrfs_delete_subvolume 2832 fs/btrfs/ctree.h int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); btrfs_delete_subvolume 4649 fs/btrfs/inode.c return btrfs_delete_subvolume(dir, dentry); btrfs_delete_subvolume 2934 fs/btrfs/ioctl.c err = btrfs_delete_subvolume(dir, dentry);