__NR_arch_specific_syscall
#define __NR_sysfs (__NR_arch_specific_syscall + 3)
#define __NR_cacheflush (__NR_arch_specific_syscall + 0)
#define __NR_arc_settls (__NR_arch_specific_syscall + 1)
#define __NR_arc_gettls (__NR_arch_specific_syscall + 2)
#define __NR_arc_usr_cmpxchg (__NR_arch_specific_syscall + 4)
#define __NR_riscv_flush_icache (__NR_arch_specific_syscall + 15)