vn_vfswlock_wait
(void) vn_vfswlock_wait(mvp);
(void) vn_vfswlock_wait(mvp);
(void) vn_vfswlock_wait(vp);
(void) vn_vfswlock_wait(curvp);
error = vn_vfswlock_wait(vp);
int vn_vfswlock_wait(struct vnode *vp);