LK_NOWAIT
if (flags & LK_NOWAIT) {
if (vget(vp, LK_EXCLUSIVE | LK_NOWAIT)) {
if (vget(vp, LK_EXCLUSIVE | LK_NOWAIT))
if (vget(vp, LK_EXCLUSIVE | LK_NOWAIT)) {
if (vget(vp, LK_EXCLUSIVE | LK_NOWAIT)) {
if (vget(vp, LK_EXCLUSIVE | LK_NOWAIT))
int lkflags = (flags & PGO_NOWAIT) ? LK_NOWAIT : 0;
if (vget(uvn->u_vnode, LK_NOWAIT))