[PATCH] minimal alpha pt_regs fixes
[linux-2.6.git] / arch / alpha / kernel / irq.c
index 76be5cf..dba4e70 100644 (file)
@@ -10,7 +10,6 @@
  * should be easier.
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/errno.h>
@@ -49,15 +48,15 @@ select_smp_affinity(unsigned int irq)
        static int last_cpu;
        int cpu = last_cpu + 1;
 
-       if (!irq_desc[irq].handler->set_affinity || irq_user_affinity[irq])
+       if (!irq_desc[irq].chip->set_affinity || irq_user_affinity[irq])
                return 1;
 
        while (!cpu_possible(cpu))
                cpu = (cpu < (NR_CPUS-1) ? cpu + 1 : 0);
        last_cpu = cpu;
 
-       irq_affinity[irq] = cpumask_of_cpu(cpu);
-       irq_desc[irq].handler->set_affinity(irq, cpumask_of_cpu(cpu));
+       irq_desc[irq].affinity = cpumask_of_cpu(cpu);
+       irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu));
        return 0;
 }
 #endif /* CONFIG_SMP */
@@ -68,53 +67,50 @@ show_interrupts(struct seq_file *p, void *v)
 #ifdef CONFIG_SMP
        int j;
 #endif
-       int i = *(loff_t *) v;
+       int irq = *(loff_t *) v;
        struct irqaction * action;
        unsigned long flags;
 
 #ifdef CONFIG_SMP
-       if (i == 0) {
+       if (irq == 0) {
                seq_puts(p, "           ");
-               for (i = 0; i < NR_CPUS; i++)
-                       if (cpu_online(i))
-                               seq_printf(p, "CPU%d       ", i);
+               for_each_online_cpu(j)
+                       seq_printf(p, "CPU%d       ", j);
                seq_putc(p, '\n');
        }
 #endif
 
-       if (i < ACTUAL_NR_IRQS) {
-               spin_lock_irqsave(&irq_desc[i].lock, flags);
-               action = irq_desc[i].action;
+       if (irq < ACTUAL_NR_IRQS) {
+               spin_lock_irqsave(&irq_desc[irq].lock, flags);
+               action = irq_desc[irq].action;
                if (!action) 
                        goto unlock;
-               seq_printf(p, "%3d: ",i);
+               seq_printf(p, "%3d: ", irq);
 #ifndef CONFIG_SMP
-               seq_printf(p, "%10u ", kstat_irqs(i));
+               seq_printf(p, "%10u ", kstat_irqs(irq));
 #else
-               for (j = 0; j < NR_CPUS; j++)
-                       if (cpu_online(j))
-                               seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+               for_each_online_cpu(j)
+                       seq_printf(p, "%10u ", kstat_cpu(j).irqs[irq]);
 #endif
-               seq_printf(p, " %14s", irq_desc[i].handler->typename);
+               seq_printf(p, " %14s", irq_desc[irq].chip->typename);
                seq_printf(p, "  %c%s",
-                       (action->flags & SA_INTERRUPT)?'+':' ',
+                       (action->flags & IRQF_DISABLED)?'+':' ',
                        action->name);
 
                for (action=action->next; action; action = action->next) {
                        seq_printf(p, ", %c%s",
-                                 (action->flags & SA_INTERRUPT)?'+':' ',
+                                 (action->flags & IRQF_DISABLED)?'+':' ',
                                   action->name);
                }
 
                seq_putc(p, '\n');
 unlock:
-               spin_unlock_irqrestore(&irq_desc[i].lock, flags);
-       } else if (i == ACTUAL_NR_IRQS) {
+               spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
+       } else if (irq == ACTUAL_NR_IRQS) {
 #ifdef CONFIG_SMP
                seq_puts(p, "IPI: ");
-               for (i = 0; i < NR_CPUS; i++)
-                       if (cpu_online(i))
-                               seq_printf(p, "%10lu ", cpu_data[i].ipi_count);
+               for_each_online_cpu(j)
+                       seq_printf(p, "%10lu ", cpu_data[j].ipi_count);
                seq_putc(p, '\n');
 #endif
                seq_printf(p, "ERR: %10lu\n", irq_err_count);
@@ -122,7 +118,6 @@ unlock:
        return 0;
 }
 
-
 /*
  * handle_irq handles all normal device IRQ's (the special
  * SMP cross-CPU interrupts have their own specific
@@ -134,6 +129,7 @@ unlock:
 void
 handle_irq(int irq, struct pt_regs * regs)
 {      
+       struct pt_regs *old_regs;
        /* 
         * We ack quickly, we don't want the irq controller
         * thinking we're snobs just because some other CPU has
@@ -154,9 +150,16 @@ handle_irq(int irq, struct pt_regs * regs)
                return;
        }
 
+       old_regs = set_irq_regs(regs);
        irq_enter();
+       /*
+        * __do_IRQ() must be called with IPL_MAX. Note that we do not
+        * explicitly enable interrupts afterwards - some MILO PALcode
+        * (namely LX164 one) seems to have severe problems with RTI
+        * at IPL 0.
+        */
        local_irq_disable();
-       __do_IRQ(irq, regs);
-       local_irq_enable();
+       __do_IRQ(irq);
        irq_exit();
+       set_irq_regs(old_regs);
 }