.enable =       hpsim_irq_noop,
        .disable =      hpsim_irq_noop,
        .ack =          hpsim_irq_noop,
-       .end =          hpsim_irq_noop,
        .set_affinity = hpsim_set_affinity_noop,
 };
 
 
 
 #define iosapic_enable_edge_irq                unmask_irq
 #define iosapic_disable_edge_irq       nop
-#define iosapic_end_edge_irq           nop
 
 static struct irq_chip irq_type_iosapic_edge = {
        .name =         "IO-SAPIC-edge",
        .enable =       iosapic_enable_edge_irq,
        .disable =      iosapic_disable_edge_irq,
        .ack =          iosapic_ack_edge_irq,
-       .end =          iosapic_end_edge_irq,
        .mask =         mask_irq,
        .unmask =       unmask_irq,
        .set_affinity = iosapic_set_affinity
 
        move_native_irq(irq);
 }
 
-static void sn_end_irq(unsigned int irq)
-{
-       int ivec;
-       u64 event_occurred;
-
-       ivec = irq & 0xff;
-       if (ivec == SGI_UART_VECTOR) {
-               event_occurred = HUB_L((u64*)LOCAL_MMR_ADDR (SH_EVENT_OCCURRED));
-               /* If the UART bit is set here, we may have received an
-                * interrupt from the UART that the driver missed.  To
-                * make sure, we IPI ourselves to force us to look again.
-                */
-               if (event_occurred & SH_EVENT_OCCURRED_UART_INT_MASK) {
-                       platform_send_ipi(smp_processor_id(), SGI_UART_VECTOR,
-                                         IA64_IPI_DM_INT, 0);
-               }
-       }
-       __clear_bit(ivec, (volatile void *)pda->sn_in_service_ivecs);
-       if (sn_force_interrupt_flag)
-               force_interrupt(irq);
-}
-
 static void sn_irq_info_free(struct rcu_head *head);
 
 struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
        .enable         = sn_enable_irq,
        .disable        = sn_disable_irq,
        .ack            = sn_ack_irq,
-       .end            = sn_end_irq,
        .mask           = sn_mask_irq,
        .unmask         = sn_unmask_irq,
        .set_affinity   = sn_set_affinity_irq