__NR_arc_usr_cmpxchg 41 arch/arc/include/uapi/asm/unistd.h #define __NR_arc_usr_cmpxchg (__NR_arch_specific_syscall + 4) __NR_arc_usr_cmpxchg 41 tools/arch/arc/include/uapi/asm/unistd.h #define __NR_arc_usr_cmpxchg (__NR_arch_specific_syscall + 4)