__NR_64_Linux_syscalls 23 arch/mips/include/asm/unistd.h #define NR_syscalls (__NR_64_Linux + __NR_64_Linux_syscalls) __NR_64_Linux_syscalls 407 arch/mips/kernel/ftrace.c if (nr >= __NR_64_Linux && nr < __NR_64_Linux + __NR_64_Linux_syscalls)