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authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-31 09:00:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-31 09:00:59 -0800
commitdb200df0b3530f673d8e9f5bd535e9e10305842a (patch)
tree9a94039b8813452c51a50fcb45e95c32a9f0e537 /kernel
parentec270e59a74eee972006a87c8e12514a20588369 (diff)
parent43a256322ac1fc105c181b3cade3b9bfc0b63ca1 (diff)
Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sparseirq: move __weak symbols into separate compilation unit sparseirq: work around __weak alias bug sparseirq: fix hang with !SPARSE_IRQ sparseirq: set lock_class for legacy irq when sparse_irq is selected sparseirq: work around compiler optimizing away __weak functions sparseirq: fix desc->lock init sparseirq: do not printk when migrating IRQ descriptors sparseirq: remove duplicated arch_early_irq_init() irq: simplify for_each_irq_desc() usage proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c irq: for_each_irq_desc() move to irqnr.h hrtimer: remove #include <linux/irq.h>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/hrtimer.c1
-rw-r--r--kernel/irq/autoprobe.c15
-rw-r--r--kernel/irq/handle.c48
-rw-r--r--kernel/irq/numa_migrate.c7
-rw-r--r--kernel/irq/spurious.c5
-rw-r--r--kernel/softirq.c20
6 files changed, 54 insertions, 42 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index bda9cb92427..eb2bfefa6dc 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -32,7 +32,6 @@
*/
#include <linux/cpu.h>
-#include <linux/irq.h>
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/hrtimer.h>
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 650ce4102a6..cc0f7321b8c 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -40,9 +40,6 @@ unsigned long probe_irq_on(void)
* flush such a longstanding irq before considering it as spurious.
*/
for_each_irq_desc_reverse(i, desc) {
- if (!desc)
- continue;
-
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
/*
@@ -71,9 +68,6 @@ unsigned long probe_irq_on(void)
* happened in the previous stage, it may have masked itself)
*/
for_each_irq_desc_reverse(i, desc) {
- if (!desc)
- continue;
-
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
@@ -92,9 +86,6 @@ unsigned long probe_irq_on(void)
* Now filter out any obviously spurious interrupts
*/
for_each_irq_desc(i, desc) {
- if (!desc)
- continue;
-
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -133,9 +124,6 @@ unsigned int probe_irq_mask(unsigned long val)
int i;
for_each_irq_desc(i, desc) {
- if (!desc)
- continue;
-
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -178,9 +166,6 @@ int probe_irq_off(unsigned long val)
unsigned int status;
for_each_irq_desc(i, desc) {
- if (!desc)
- continue;
-
spin_lock_irq(&desc->lock);
status = desc->status;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6492400cb50..c20db0be917 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -56,10 +56,6 @@ void handle_bad_irq(unsigned int irq, struct irq_desc *desc)
int nr_irqs = NR_IRQS;
EXPORT_SYMBOL_GPL(nr_irqs);
-void __init __attribute__((weak)) arch_early_irq_init(void)
-{
-}
-
#ifdef CONFIG_SPARSE_IRQ
static struct irq_desc irq_desc_init = {
.irq = -1,
@@ -90,13 +86,11 @@ void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
desc->kstat_irqs = (unsigned int *)ptr;
}
-void __attribute__((weak)) arch_init_chip_data(struct irq_desc *desc, int cpu)
-{
-}
-
static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
{
memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
+
+ spin_lock_init(&desc->lock);
desc->irq = irq;
#ifdef CONFIG_SMP
desc->cpu = cpu;
@@ -134,7 +128,7 @@ static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_sm
/* FIXME: use bootmem alloc ...*/
static unsigned int kstat_irqs_legacy[NR_IRQS_LEGACY][NR_CPUS];
-void __init early_irq_init(void)
+int __init early_irq_init(void)
{
struct irq_desc *desc;
int legacy_count;
@@ -146,6 +140,7 @@ void __init early_irq_init(void)
for (i = 0; i < legacy_count; i++) {
desc[i].irq = i;
desc[i].kstat_irqs = kstat_irqs_legacy[i];
+ lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
irq_desc_ptrs[i] = desc + i;
}
@@ -153,7 +148,7 @@ void __init early_irq_init(void)
for (i = legacy_count; i < NR_IRQS; i++)
irq_desc_ptrs[i] = NULL;
- arch_early_irq_init();
+ return arch_early_irq_init();
}
struct irq_desc *irq_to_desc(unsigned int irq)
@@ -203,7 +198,7 @@ out_unlock:
return desc;
}
-#else
+#else /* !CONFIG_SPARSE_IRQ */
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = {
@@ -218,7 +213,31 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
}
};
-#endif
+int __init early_irq_init(void)
+{
+ struct irq_desc *desc;
+ int count;
+ int i;
+
+ desc = irq_desc;
+ count = ARRAY_SIZE(irq_desc);
+
+ for (i = 0; i < count; i++)
+ desc[i].irq = i;
+
+ return arch_early_irq_init();
+}
+
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ return (irq < NR_IRQS) ? irq_desc + irq : NULL;
+}
+
+struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
+{
+ return irq_to_desc(irq);
+}
+#endif /* !CONFIG_SPARSE_IRQ */
/*
* What should we do if we get a hw irq event on an illegal vector?
@@ -428,9 +447,6 @@ void early_init_irq_lock_class(void)
int i;
for_each_irq_desc(i, desc) {
- if (!desc)
- continue;
-
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
}
}
@@ -439,7 +455,7 @@ void early_init_irq_lock_class(void)
unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
struct irq_desc *desc = irq_to_desc(irq);
- return desc->kstat_irqs[cpu];
+ return desc ? desc->kstat_irqs[cpu] : 0;
}
#endif
EXPORT_SYMBOL(kstat_irqs_cpu);
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index 089c3746358..ecf765c6a77 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -42,6 +42,7 @@ static void init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
struct irq_desc *desc, int cpu)
{
memcpy(desc, old_desc, sizeof(struct irq_desc));
+ spin_lock_init(&desc->lock);
desc->cpu = cpu;
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
init_copy_kstat_irqs(old_desc, desc, cpu, nr_cpu_ids);
@@ -74,10 +75,8 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
node = cpu_to_node(cpu);
desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
- printk(KERN_DEBUG " move irq_desc for %d to cpu %d node %d\n",
- irq, cpu, node);
if (!desc) {
- printk(KERN_ERR "can not get new irq_desc for moving\n");
+ printk(KERN_ERR "irq %d: can not get new irq_desc for migration.\n", irq);
/* still use old one */
desc = old_desc;
goto out_unlock;
@@ -106,8 +105,6 @@ struct irq_desc *move_irq_desc(struct irq_desc *desc, int cpu)
return desc;
old_cpu = desc->cpu;
- printk(KERN_DEBUG
- "try to move irq_desc from cpu %d to %d\n", old_cpu, cpu);
if (old_cpu != cpu) {
node = cpu_to_node(cpu);
old_node = cpu_to_node(old_cpu);
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 3738107531f..dd364c11e56 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -91,9 +91,6 @@ static int misrouted_irq(int irq)
int i, ok = 0;
for_each_irq_desc(i, desc) {
- if (!desc)
- continue;
-
if (!i)
continue;
@@ -115,8 +112,6 @@ static void poll_spurious_irqs(unsigned long dummy)
for_each_irq_desc(i, desc) {
unsigned int status;
- if (!desc)
- continue;
if (!i)
continue;
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 466e75ce271..670c1eca47e 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -784,3 +784,23 @@ int on_each_cpu(void (*func) (void *info), void *info, int wait)
}
EXPORT_SYMBOL(on_each_cpu);
#endif
+
+/*
+ * [ These __weak aliases are kept in a separate compilation unit, so that
+ * GCC does not inline them incorrectly. ]
+ */
+
+int __init __weak early_irq_init(void)
+{
+ return 0;
+}
+
+int __init __weak arch_early_irq_init(void)
+{
+ return 0;
+}
+
+int __weak arch_init_chip_data(struct irq_desc *desc, int cpu)
+{
+ return 0;
+}