x86: Use sane enumeration

Instead of looping through all interrupts, use the bitmap lookup to
find the next.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 5193f20..057b0e1 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1160,7 +1160,6 @@ void __setup_vector_irq(int cpu)
        /* Initialize vector_irq on a new cpu */
        int irq, vector;
        struct irq_cfg *cfg;
-       struct irq_desc *desc;
 
        /*
         * vector_lock will make sure that we don't run into irq vector
@@ -1169,9 +1168,10 @@ void __setup_vector_irq(int cpu)
         */
        raw_spin_lock(&vector_lock);
        /* Mark the inuse vectors */
-       for_each_irq_desc(irq, desc) {
-               cfg = get_irq_desc_chip_data(desc);
-
+       for_each_active_irq(irq) {
+               cfg = get_irq_chip_data(irq);
+               if (!cfg)
+                       continue;
                /*
                 * If it is a legacy IRQ handled by the legacy PIC, this cpu
                 * will be part of the irq_cfg's domain.
@@ -1516,7 +1516,6 @@ __apicdebuginit(void) print_IO_APIC(void)
        union IO_APIC_reg_03 reg_03;
        unsigned long flags;
        struct irq_cfg *cfg;
-       struct irq_desc *desc;
        unsigned int irq;
 
        printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
@@ -1603,10 +1602,10 @@ __apicdebuginit(void) print_IO_APIC(void)
        }
        }
        printk(KERN_DEBUG "IRQ to pin mappings:\n");
-       for_each_irq_desc(irq, desc) {
+       for_each_active_irq(irq) {
                struct irq_pin_list *entry;
 
-               cfg = get_irq_desc_chip_data(desc);
+               cfg = get_irq_chip_data(irq);
                if (!cfg)
                        continue;
                entry = cfg->irq_2_pin;
@@ -2574,9 +2573,8 @@ static struct irq_chip ir_ioapic_chip __read_mostly = {
 
 static inline void init_IO_APIC_traps(void)
 {
-       int irq;
-       struct irq_desc *desc;
        struct irq_cfg *cfg;
+       unsigned int irq;
 
        /*
         * NOTE! The local APIC isn't very good at handling
@@ -2589,8 +2587,8 @@ static inline void init_IO_APIC_traps(void)
         * Also, we've got to be careful not to trash gate
         * 0x80, because int 0x80 is hm, kind of importantish. ;)
         */
-       for_each_irq_desc(irq, desc) {
-               cfg = get_irq_desc_chip_data(desc);
+       for_each_active_irq(irq) {
+               cfg = get_irq_chip_data(irq);
                if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {
                        /*
                         * Hmm.. We don't have an entry for this,
@@ -2601,7 +2599,7 @@ static inline void init_IO_APIC_traps(void)
                                legacy_pic->make_irq(irq);
                        else
                                /* Strange. Oh, well.. */
-                               desc->chip = &no_irq_chip;
+                               set_irq_chip(irq, &no_irq_chip);
                }
        }
 }