swaplist_find
if (swaplist_find(sdp->swd_vp, true) == NULL)
static struct swapdev *swaplist_find(struct vnode *, bool);
if ((sdp = swaplist_find(vp, true)) == NULL) {
if (swaplist_find(vp, false) != NULL) {
(void) swaplist_find(vp, true); /* kill fake entry */
if ((sdp = swaplist_find(vp, false)) == NULL) {