CPUCLOCK_PERTHREAD_MASK 22 include/linux/posix-timers.h (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) CPUCLOCK_PERTHREAD_MASK 35 include/linux/posix-timers.h MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)