ZS_NEEDSOFT
if (zs->zs_flags & ZS_NEEDSOFT) {
zs->zs_flags &= ~ZS_NEEDSOFT;
if (zs->zs_flags & ZS_NEEDSOFT) {
zs->zs_flags &= ~ZS_NEEDSOFT;
if (zs->zs_flags & ZS_NEEDSOFT) {
zs->zs_flags &= ~ZS_NEEDSOFT;
zs->zs_flags |= ZS_NEEDSOFT; \