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Diffstat (limited to 'arch/x86/kernel/io_apic_32.c')
-rw-r--r--arch/x86/kernel/io_apic_32.c46
1 files changed, 34 insertions, 12 deletions
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 7f2bcc3dad82..c2160cfdec9b 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -345,6 +345,7 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t cpumask)
struct irq_pin_list *entry = irq_2_pin + irq;
unsigned int apicid_value;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, cpumask, cpu_online_map);
if (cpus_empty(tmp))
@@ -365,7 +366,8 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t cpumask)
break;
entry = irq_2_pin + entry->next;
}
- irq_desc[irq].affinity = cpumask;
+ desc = irq_to_desc(irq);
+ desc->affinity = cpumask;
spin_unlock_irqrestore(&ioapic_lock, flags);
}
@@ -475,10 +477,12 @@ static inline void balance_irq(int cpu, int irq)
static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
{
int i, j;
+ struct irq_desc *desc;
for_each_online_cpu(i) {
for (j = 0; j < nr_irqs; j++) {
- if (!irq_desc[j].action)
+ desc = irq_to_desc(j);
+ if (!desc->action)
continue;
/* Is it a significant load ? */
if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i), j) <
@@ -505,6 +509,7 @@ static void do_irq_balance(void)
unsigned long tmp_cpu_irq;
unsigned long imbalance = 0;
cpumask_t allowed_mask, target_cpu_mask, tmp;
+ struct irq_desc *desc;
for_each_possible_cpu(i) {
int package_index;
@@ -515,7 +520,8 @@ static void do_irq_balance(void)
for (j = 0; j < nr_irqs; j++) {
unsigned long value_now, delta;
/* Is this an active IRQ or balancing disabled ? */
- if (!irq_desc[j].action || irq_balancing_disabled(j))
+ desc = irq_to_desc(j);
+ if (!desc->action || irq_balancing_disabled(j))
continue;
if (package_index == i)
IRQ_DELTA(package_index, j) = 0;
@@ -609,7 +615,8 @@ tryanotherirq:
selected_irq = -1;
for (j = 0; j < nr_irqs; j++) {
/* Is this an active IRQ? */
- if (!irq_desc[j].action)
+ desc = irq_to_desc(j);
+ if (!desc->action)
continue;
if (imbalance <= IRQ_DELTA(max_loaded, j))
continue;
@@ -682,10 +689,12 @@ static int balanced_irq(void *unused)
int i;
unsigned long prev_balance_time = jiffies;
long time_remaining = balanced_irq_interval;
+ struct irq_desc *desc;
/* push everything to CPU 0 to give us a starting point. */
for (i = 0 ; i < nr_irqs ; i++) {
- irq_desc[i].pending_mask = cpumask_of_cpu(0);
+ desc = irq_to_desc(i);
+ desc->pending_mask = cpumask_of_cpu(0);
set_pending_irq(i, cpumask_of_cpu(0));
}
@@ -1254,13 +1263,16 @@ static struct irq_chip ioapic_chip;
static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
trigger == IOAPIC_LEVEL) {
- irq_desc[irq].status |= IRQ_LEVEL;
+ desc->status |= IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq, "fasteoi");
} else {
- irq_desc[irq].status &= ~IRQ_LEVEL;
+ desc->status &= ~IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_edge_irq, "edge");
}
@@ -2027,6 +2039,7 @@ static struct irq_chip ioapic_chip __read_mostly = {
static inline void init_IO_APIC_traps(void)
{
int irq;
+ struct irq_desc *desc;
/*
* NOTE! The local APIC isn't very good at handling
@@ -2048,9 +2061,11 @@ static inline void init_IO_APIC_traps(void)
*/
if (irq < 16)
make_8259A_irq(irq);
- else
+ else {
+ desc = irq_to_desc(irq);
/* Strange. Oh, well.. */
- irq_desc[irq].chip = &no_irq_chip;
+ desc->chip = &no_irq_chip;
+ }
}
}
}
@@ -2089,7 +2104,10 @@ static struct irq_chip lapic_chip __read_mostly = {
static void lapic_register_intr(int irq, int vector)
{
- irq_desc[irq].status &= ~IRQ_LEVEL;
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ desc->status &= ~IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq,
"edge");
set_intr_gate(vector, interrupt[irq]);
@@ -2556,6 +2574,7 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
unsigned int dest;
cpumask_t tmp;
int vector;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2575,7 +2594,8 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
write_msi_msg(irq, &msg);
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#endif /* CONFIG_SMP */
@@ -2649,6 +2669,7 @@ static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
{
unsigned int dest;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2659,7 +2680,8 @@ static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
dest = cpu_mask_to_apicid(mask);
target_ht_irq(irq, dest);
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#endif