rem: rootfs_remove_vnode(fs_cookie _fs, fs_vnode _vnode, bool reenter)
add: rootfs_remove_vnode(fs_volume _fs, fs_vnode _vnode, bool reenter)
context: rootfs_remove_vnode(fs_cookie _fs, fs_vnode _vnode, bool reenter){	struct rootfs *fs = (struct rootfs *)_fs;	struct rootfs_vnode *vnode = (struct rootfs_vnode *)_vnode;	TRACE(("rootfs_removevnode: remove %p (0x%Lx), r %d\n", vnode, vnode->id, reenter));	if (!reenter)		mutex_lock(&fs->lock);	if (vnode->dir_next) {		// can't remove node if it's linked to the dir		panic("rootfs_removevnode: vnode %p asked to be removed is present in dir\n", vnode);	}	rootfs_delete_vnode(fs, vnode, false);	if (!reenter)		mutex_unlock(&fs->lock);	return 0;}