bsd/hfs/hfs_vfsops.c

2623 		struct vnode *btvp;
2625 		btvp = meta_vp[i];;
2626 		if ((btvp==0) || (vnode_mount(btvp) != mp))
2630 		(void) hfs_lock(VTOC(btvp), HFS_EXCLUSIVE_LOCK);
2631 		cp = VTOC(btvp);
2637 		    vnode_hasdirtyblks(btvp) == 0) {
2638 			hfs_unlock(VTOC(btvp));
2641 		error = vnode_get(btvp);
2643 			hfs_unlock(VTOC(btvp));
2646 		if ((error = hfs_fsync(btvp, waitfor, 0, p)))
2650 		vnode_put(btvp);