tty: Handle problem if line discipline does not have receive_buf

[linux/fpc-iii.git] / lib / locking-selftest-spin.h

/* SPDX-License-Identifier: GPL-2.0 */
#undef LOCK
#define LOCK            L

#undef UNLOCK
#define UNLOCK          U

#undef RLOCK
#undef WLOCK

#undef INIT
#define INIT            SI