tools/arch/x86/include/asm/unistd_32.h

#ifndef __NR_perf_event_open
# define __NR_perf_event_open 336
#endif
#ifndef __NR_futex
# define __NR_futex 240
#endif
#ifndef __NR_gettid
# define __NR_gettid 224
#endif
#ifndef __NR_getcpu
# define __NR_getcpu 318
#endif