_TIF_RESTOREALL
set_bits(_TIF_RESTOREALL, ¤t_thread_info()->flags);
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
if (likely(!(ti_flags & (_TIF_NOERROR | _TIF_RESTOREALL)))) {
if (ti_flags & _TIF_RESTOREALL)
ret = _TIF_RESTOREALL;
ret |= _TIF_RESTOREALL;
ret = current_thread_info()->exit_flags & _TIF_RESTOREALL;
current_thread_info()->exit_flags &= ~_TIF_RESTOREALL;
ret = current_thread_info()->exit_flags & _TIF_RESTOREALL;
current_thread_info()->exit_flags |= _TIF_RESTOREALL;
ti->flags |= _TIF_RESTOREALL;