dounmount
error = dounmount(mvfsp, 0, CRED());
error = dounmount(vfsp, 0, kcred);
if ((error = dounmount(vfsp, 0, crp)) != 0)
if ((err = dounmount(vfsp, 0, kcred)) != 0) {
(void) dounmount(vfsp, 0, CRED());
error = dounmount(vfsp, 0, CRED());
error = dounmount(vn_mountedvfs(svp), fflags, cr);
(void) dounmount(vfsp, MS_FORCE, kcred);
(void) dounmount(zfsvfs->z_vfs, MS_FORCE, CRED());
int dounmount(struct vfs *, int, cred_t *);
if ((error = dounmount(vfsp, flag, cr)) != 0)