syscall_enter_from_user_mode_work
nr = syscall_enter_from_user_mode_work(regs, nr);
nr = syscall_enter_from_user_mode_work(regs, nr);
nr = syscall_enter_from_user_mode_work(regs, nr);
nr = syscall_enter_from_user_mode_work(regs, nr);
ret = syscall_enter_from_user_mode_work(regs, syscall);