216 static volatile unsigned int ftx;  variable
318 	ftx = 1;  in test_wrbase()
319 	syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);  in test_wrbase()
320 	while (ftx != 0)  in test_wrbase()
321 		syscall(SYS_futex, &ftx, FUTEX_WAIT, 1, NULL, NULL, 0);  in test_wrbase()
338 		while (ftx == 0)  in threadproc()
339 			syscall(SYS_futex, &ftx, FUTEX_WAIT, 0, NULL, NULL, 0);  in threadproc()
340 		if (ftx == 3)  in threadproc()
343 		if (ftx == 1) {  in threadproc()
345 		} else if (ftx == 2) {  in threadproc()
357 		ftx = 0;  in threadproc()
358 		syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);  in threadproc()
404 	ftx = 1;  in set_gs_and_switch_to()
405 	syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);  in set_gs_and_switch_to()
406 	while (ftx != 0)  in set_gs_and_switch_to()
407 		syscall(SYS_futex, &ftx, FUTEX_WAIT, 1, NULL, NULL, 0);  in set_gs_and_switch_to()
438 	ftx = 2;  in test_unexpected_base()
439 	syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);  in test_unexpected_base()
440 	while (ftx != 0)  in test_unexpected_base()
441 		syscall(SYS_futex, &ftx, FUTEX_WAIT, 1, NULL, NULL, 0);  in test_unexpected_base()
677 	ftx = 3;  /* Kill the thread. */  in main()
678 	syscall(SYS_futex, &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);  in main()