[PATCH] Replace mp bus array with bitmap for bus not pci

Since we only support PCI and ISA legacy busses now there is no need to
have an full array with checking.

Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 22 insertions, 70 deletions

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 8bbff64c20d7..a1412042b918 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -308,7 +308,7 @@ static int __init find_isa_irq_pin(int irq, int type)
         for (i = 0; i < mp_irq_entries; i++) {
                 int lbus = mp_irqs[i].mpc_srcbus;
 
-                if (mp_bus_id_to_type[lbus] == MP_BUS_ISA &&
+                if (test_bit(lbus, mp_bus_not_pci) &&
                     (mp_irqs[i].mpc_irqtype == type) &&
                     (mp_irqs[i].mpc_srcbusirq == irq))
 
@@ -324,7 +324,7 @@ static int __init find_isa_irq_apic(int irq, int type)
         for (i = 0; i < mp_irq_entries; i++) {
                 int lbus = mp_irqs[i].mpc_srcbus;
 
-                if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA) &&
+                if (test_bit(lbus, mp_bus_not_pci) &&
                     (mp_irqs[i].mpc_irqtype == type) &&
                     (mp_irqs[i].mpc_srcbusirq == irq))
                         break;
@@ -364,7 +364,7 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
                             mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
                                 break;
 
-                if ((mp_bus_id_to_type[lbus] == MP_BUS_PCI) &&
+                if (!test_bit(lbus, mp_bus_not_pci) &&
                     !mp_irqs[i].mpc_irqtype &&
                     (bus == lbus) &&
                     (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
@@ -410,28 +410,11 @@ static int __init MPBIOS_polarity(int idx)
         switch (mp_irqs[idx].mpc_irqflag & 3)
         {
                 case 0: /* conforms, ie. bus-type dependent polarity */
-                {
-                        switch (mp_bus_id_to_type[bus])
-                        {
-                                case MP_BUS_ISA: /* ISA pin */
-                                {
-                                        polarity = default_ISA_polarity(idx);
-                                        break;
-                                }
-                                case MP_BUS_PCI: /* PCI pin */
-                                {
-                                        polarity = default_PCI_polarity(idx);
-                                        break;
-                                }
-                                default:
-                                {
-                                        printk(KERN_WARNING "broken BIOS!!\n");
-                                        polarity = 1;
-                                        break;
-                                }
-                        }
+                        if (test_bit(bus, mp_bus_not_pci))
+                                polarity = default_ISA_polarity(idx);
+                        else
+                                polarity = default_PCI_polarity(idx);
                         break;
-                }
                 case 1: /* high active */
                 {
                         polarity = 0;
@@ -469,28 +452,11 @@ static int MPBIOS_trigger(int idx)
         switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
         {
                 case 0: /* conforms, ie. bus-type dependent */
-                {
-                        switch (mp_bus_id_to_type[bus])
-                        {
-                                case MP_BUS_ISA: /* ISA pin */
-                                {
-                                        trigger = default_ISA_trigger(idx);
-                                        break;
-                                }
-                                case MP_BUS_PCI: /* PCI pin */
-                                {
-                                        trigger = default_PCI_trigger(idx);
-                                        break;
-                                }
-                                default:
-                                {
-                                        printk(KERN_WARNING "broken BIOS!!\n");
-                                        trigger = 1;
-                                        break;
-                                }
-                        }
+                        if (test_bit(bus, mp_bus_not_pci))
+                                trigger = default_ISA_trigger(idx);
+                        else
+                                trigger = default_PCI_trigger(idx);
                         break;
-                }
                 case 1: /* edge */
                 {
                         trigger = 0;
@@ -596,31 +562,17 @@ static int pin_2_irq(int idx, int apic, int pin)
         if (mp_irqs[idx].mpc_dstirq != pin)
                 printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
 
-        switch (mp_bus_id_to_type[bus])
-        {
-                case MP_BUS_ISA: /* ISA pin */
-                {
-                        irq = mp_irqs[idx].mpc_srcbusirq;
-                        break;
-                }
-                case MP_BUS_PCI: /* PCI pin */
-                {
-                        /*
-                         * PCI IRQs are mapped in order
-                         */
-                        i = irq = 0;
-                        while (i < apic)
-                                irq += nr_ioapic_registers[i++];
-                        irq += pin;
-                        irq = gsi_irq_sharing(irq);
-                        break;
-                }
-                default:
-                {
-                        printk(KERN_ERR "unknown bus type %d.\n",bus); 
-                        irq = 0;
-                        break;
-                }
+        if (test_bit(bus, mp_bus_not_pci)) {
+                irq = mp_irqs[idx].mpc_srcbusirq;
+        } else {
+                /*
+                 * PCI IRQs are mapped in order
+                 */
+                i = irq = 0;
+                while (i < apic)
+                        irq += nr_ioapic_registers[i++];
+                irq += pin;
+                irq = gsi_irq_sharing(irq);
         }
         BUG_ON(irq >= NR_IRQS);
         return irq;