EP_UNACTIVE_PTR
ep->ovflist = EP_UNACTIVE_PTR; /* not scanning */
for (p = ctx->tfile_check_list; p != EP_UNACTIVE_PTR; p = p->next) {
while (ctx->tfile_check_list != EP_UNACTIVE_PTR) {
.tfile_check_list = EP_UNACTIVE_PTR,
return READ_ONCE(ep->ovflist) != EP_UNACTIVE_PTR;
WRITE_ONCE(ep->ovflist, EP_UNACTIVE_PTR);
return epi->ovflist_next != EP_UNACTIVE_PTR;
epi->ovflist_next = EP_UNACTIVE_PTR;