- if (unlikely(prev->iopl != next->iopl))
- set_iopl_mask(next->iopl);
-
- /*
- * Now maybe reload the debug registers
- */
- if (unlikely(next->debugreg[7])) {
- set_debugreg(next->debugreg[0], 0);
- set_debugreg(next->debugreg[1], 1);
- set_debugreg(next->debugreg[2], 2);
- set_debugreg(next->debugreg[3], 3);
- /* no 4 and 5 */
- set_debugreg(next->debugreg[6], 6);
- set_debugreg(next->debugreg[7], 7);
- }
-
- if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr))
- handle_io_bitmap(next, tss);
+ if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)
+ || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)))
+ __switch_to_xtra(next_p, tss);