IO_BUFLOCKED
if (reclaimed == 0 && (flags & IO_BUFLOCKED) == 0) {
if (reclaimed == 0 && (flags & IO_BUFLOCKED) == 0) {
flags | IO_BUFLOCKED, cred, &newb);
flags | IO_BUFLOCKED, cred, &newb)) != 0) {
flags | IO_BUFLOCKED, cred, &newb);
flags | IO_BUFLOCKED, cred, &newb)) != 0) {