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-rw-r--r--include/linux/irq.h54
-rw-r--r--kernel/irq/autoprobe.c16
-rw-r--r--kernel/irq/handle.c4
-rw-r--r--kernel/irq/manage.c29
-rw-r--r--kernel/irq/spurious.c23
5 files changed, 66 insertions, 60 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index eac1273..92c6854 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -1,5 +1,5 @@
-#ifndef __irq_h
-#define __irq_h
+#ifndef _LINUX_IRQ_H
+#define _LINUX_IRQ_H
/*
* Please do not include this file in generic code. There is currently
@@ -11,7 +11,7 @@
#include <linux/smp.h>
-#if !defined(CONFIG_S390)
+#ifndef CONFIG_S390
#include <linux/linkage.h>
#include <linux/cache.h>
@@ -33,7 +33,7 @@
#define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */
#define IRQ_LEVEL 64 /* IRQ level triggered */
#define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */
-#if defined(ARCH_HAS_IRQ_PER_CPU)
+#ifdef ARCH_HAS_IRQ_PER_CPU
# define IRQ_PER_CPU 256 /* IRQ is per CPU */
# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
#else
@@ -45,7 +45,7 @@
* to describe about the low-level hardware.
*/
struct hw_interrupt_type {
- const char * typename;
+ const char *typename;
unsigned int (*startup)(unsigned int irq);
void (*shutdown)(unsigned int irq);
void (*enable)(unsigned int irq);
@@ -80,7 +80,7 @@ typedef struct irq_desc {
#ifdef CONFIG_SMP
cpumask_t affinity;
#endif
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
+#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
unsigned int move_irq; /* Flag need to re-target intr dest*/
#endif
} ____cacheline_aligned irq_desc_t;
@@ -89,9 +89,10 @@ extern irq_desc_t irq_desc [NR_IRQS];
#include <asm/hw_irq.h> /* the arch dependent stuff */
-extern int setup_irq(unsigned int irq, struct irqaction * new);
+extern int setup_irq(unsigned int irq, struct irqaction *new);
#ifdef CONFIG_GENERIC_HARDIRQS
+
#ifdef CONFIG_SMP
static inline void set_native_irq_info(int irq, cpumask_t mask)
{
@@ -105,7 +106,7 @@ static inline void set_native_irq_info(int irq, cpumask_t mask)
#ifdef CONFIG_SMP
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
+#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
extern cpumask_t pending_irq_cpumask[NR_IRQS];
void set_pending_irq(unsigned int irq, cpumask_t mask);
@@ -127,7 +128,7 @@ static inline void set_irq_info(int irq, cpumask_t mask)
{
}
-#else // CONFIG_PCI_MSI
+#else /* CONFIG_PCI_MSI */
static inline void move_irq(int irq)
{
@@ -138,26 +139,36 @@ static inline void set_irq_info(int irq, cpumask_t mask)
{
set_native_irq_info(irq, mask);
}
-#endif // CONFIG_PCI_MSI
-#else // CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE
+#endif /* CONFIG_PCI_MSI */
+
+#else /* CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE */
+
+static inline void move_irq(int irq)
+{
+}
+
+static inline void move_native_irq(int irq)
+{
+}
+
+static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
+{
+}
-#define move_irq(x)
-#define move_native_irq(x)
-#define set_pending_irq(x,y)
static inline void set_irq_info(int irq, cpumask_t mask)
{
set_native_irq_info(irq, mask);
}
-#endif // CONFIG_GENERIC_PENDING_IRQ
+#endif /* CONFIG_GENERIC_PENDING_IRQ */
-#else // CONFIG_SMP
+#else /* CONFIG_SMP */
#define move_irq(x)
#define move_native_irq(x)
-#endif // CONFIG_SMP
+#endif /* CONFIG_SMP */
#ifdef CONFIG_IRQBALANCE
extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
@@ -186,17 +197,16 @@ extern void init_irq_proc(void);
#ifdef CONFIG_AUTO_IRQ_AFFINITY
extern int select_smp_affinity(unsigned int irq);
#else
-static inline int
-select_smp_affinity(unsigned int irq)
+static inline int select_smp_affinity(unsigned int irq)
{
return 1;
}
#endif
-#endif
+#endif /* CONFIG_GENERIC_HARDIRQS */
extern hw_irq_controller no_irq_type; /* needed in every arch ? */
-#endif
+#endif /* !CONFIG_S390 */
-#endif /* __irq_h */
+#endif /* _LINUX_IRQ_H */
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index d1f1e6f..d6eab98 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -27,7 +27,7 @@ static DEFINE_MUTEX(probing_active);
*/
unsigned long probe_irq_on(void)
{
- unsigned long val;
+ unsigned long mask;
irq_desc_t *desc;
unsigned int i;
@@ -40,8 +40,8 @@ unsigned long probe_irq_on(void)
desc = irq_desc + i;
spin_lock_irq(&desc->lock);
- if (!irq_desc[i].action)
- irq_desc[i].chip->startup(i);
+ if (!desc->action)
+ desc->chip->startup(i);
spin_unlock_irq(&desc->lock);
}
@@ -73,11 +73,11 @@ unsigned long probe_irq_on(void)
/*
* Now filter out any obviously spurious interrupts
*/
- val = 0;
+ mask = 0;
for (i = 0; i < NR_IRQS; i++) {
- irq_desc_t *desc = irq_desc + i;
unsigned int status;
+ desc = irq_desc + i;
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -88,14 +88,13 @@ unsigned long probe_irq_on(void)
desc->chip->shutdown(i);
} else
if (i < 32)
- val |= 1 << i;
+ mask |= 1 << i;
}
spin_unlock_irq(&desc->lock);
}
- return val;
+ return mask;
}
-
EXPORT_SYMBOL(probe_irq_on);
/**
@@ -184,6 +183,5 @@ int probe_irq_off(unsigned long val)
return irq_found;
}
-
EXPORT_SYMBOL(probe_irq_off);
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6b313cc..f9c33a8 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -18,7 +18,7 @@
* Linux has a controller-independent interrupt architecture.
* Every controller has a 'controller-template', that is used
* by the main code to do the right thing. Each driver-visible
- * interrupt source is transparently wired to the apropriate
+ * interrupt source is transparently wired to the appropriate
* controller. Thus drivers need not be aware of the
* interrupt-controller.
*
@@ -111,7 +111,7 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs)
{
irq_desc_t *desc = irq_desc + irq;
- struct irqaction * action;
+ struct irqaction *action;
unsigned int status;
kstat_this_cpu.irqs[irq]++;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c53662e..261906e 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -40,7 +40,6 @@ void synchronize_irq(unsigned int irq)
while (desc->status & IRQ_INPROGRESS)
cpu_relax();
}
-
EXPORT_SYMBOL(synchronize_irq);
#endif
@@ -71,7 +70,6 @@ void disable_irq_nosync(unsigned int irq)
}
spin_unlock_irqrestore(&desc->lock, flags);
}
-
EXPORT_SYMBOL(disable_irq_nosync);
/**
@@ -97,7 +95,6 @@ void disable_irq(unsigned int irq)
if (desc->action)
synchronize_irq(irq);
}
-
EXPORT_SYMBOL(disable_irq);
/**
@@ -139,7 +136,6 @@ void enable_irq(unsigned int irq)
}
spin_unlock_irqrestore(&desc->lock, flags);
}
-
EXPORT_SYMBOL(enable_irq);
/*
@@ -166,7 +162,7 @@ int can_request_irq(unsigned int irq, unsigned long irqflags)
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
*/
-int setup_irq(unsigned int irq, struct irqaction * new)
+int setup_irq(unsigned int irq, struct irqaction *new)
{
struct irq_desc *desc = irq_desc + irq;
struct irqaction *old, **p;
@@ -198,9 +194,10 @@ int setup_irq(unsigned int irq, struct irqaction * new)
/*
* The following block of code has to be executed atomically
*/
- spin_lock_irqsave(&desc->lock,flags);
+ spin_lock_irqsave(&desc->lock, flags);
p = &desc->action;
- if ((old = *p) != NULL) {
+ old = *p;
+ if (old) {
/* Can't share interrupts unless both agree to */
if (!(old->flags & new->flags & SA_SHIRQ))
goto mismatch;
@@ -233,7 +230,7 @@ int setup_irq(unsigned int irq, struct irqaction * new)
else
desc->chip->enable(irq);
}
- spin_unlock_irqrestore(&desc->lock,flags);
+ spin_unlock_irqrestore(&desc->lock, flags);
new->irq = irq;
register_irq_proc(irq);
@@ -276,10 +273,10 @@ void free_irq(unsigned int irq, void *dev_id)
return;
desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock,flags);
+ spin_lock_irqsave(&desc->lock, flags);
p = &desc->action;
for (;;) {
- struct irqaction * action = *p;
+ struct irqaction *action = *p;
if (action) {
struct irqaction **pp = p;
@@ -304,7 +301,7 @@ void free_irq(unsigned int irq, void *dev_id)
else
desc->chip->disable(irq);
}
- spin_unlock_irqrestore(&desc->lock,flags);
+ spin_unlock_irqrestore(&desc->lock, flags);
unregister_handler_proc(irq, action);
/* Make sure it's not being used on another CPU */
@@ -312,12 +309,11 @@ void free_irq(unsigned int irq, void *dev_id)
kfree(action);
return;
}
- printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
- spin_unlock_irqrestore(&desc->lock,flags);
+ printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
+ spin_unlock_irqrestore(&desc->lock, flags);
return;
}
}
-
EXPORT_SYMBOL(free_irq);
/**
@@ -351,9 +347,9 @@ EXPORT_SYMBOL(free_irq);
*/
int request_irq(unsigned int irq,
irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char * devname, void *dev_id)
+ unsigned long irqflags, const char *devname, void *dev_id)
{
- struct irqaction * action;
+ struct irqaction *action;
int retval;
/*
@@ -388,6 +384,5 @@ int request_irq(unsigned int irq,
return retval;
}
-
EXPORT_SYMBOL(request_irq);
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index ea3ceed..5eae7bf 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -16,22 +16,20 @@ static int irqfixup __read_mostly;
/*
* Recovery handler for misrouted interrupts.
*/
-
static int misrouted_irq(int irq, struct pt_regs *regs)
{
int i;
- irq_desc_t *desc;
int ok = 0;
int work = 0; /* Did we do work for a real IRQ */
- for(i = 1; i < NR_IRQS; i++) {
+ for (i = 1; i < NR_IRQS; i++) {
+ struct irq_desc *desc = irq_desc + i;
struct irqaction *action;
if (i == irq) /* Already tried */
continue;
- desc = &irq_desc[i];
+
spin_lock(&desc->lock);
- action = desc->action;
/* Already running on another processor */
if (desc->status & IRQ_INPROGRESS) {
/*
@@ -45,7 +43,9 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
}
/* Honour the normal IRQ locking */
desc->status |= IRQ_INPROGRESS;
+ action = desc->action;
spin_unlock(&desc->lock);
+
while (action) {
/* Only shared IRQ handlers are safe to call */
if (action->flags & SA_SHIRQ) {
@@ -62,9 +62,8 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
/*
* While we were looking for a fixup someone queued a real
- * IRQ clashing with our walk
+ * IRQ clashing with our walk:
*/
-
while ((desc->status & IRQ_PENDING) && action) {
/*
* Perform real IRQ processing for the IRQ we deferred
@@ -80,7 +79,7 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
* If we did actual work for the real IRQ line we must let the
* IRQ controller clean up too
*/
- if(work)
+ if (work)
desc->chip->end(i);
spin_unlock(&desc->lock);
}
@@ -113,6 +112,7 @@ __report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
}
dump_stack();
printk(KERN_ERR "handlers:\n");
+
action = desc->action;
while (action) {
printk(KERN_ERR "[<%p>]", action->handler);
@@ -123,7 +123,8 @@ __report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
}
}
-static void report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
+static void
+report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
{
static int count = 100;
@@ -134,7 +135,7 @@ static void report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t actio
}
void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
- struct pt_regs *regs)
+ struct pt_regs *regs)
{
if (unlikely(action_ret != IRQ_HANDLED)) {
desc->irqs_unhandled++;
@@ -177,6 +178,7 @@ int __init noirqdebug_setup(char *str)
{
noirqdebug = 1;
printk(KERN_INFO "IRQ lockup detection disabled\n");
+
return 1;
}
@@ -187,6 +189,7 @@ static int __init irqfixup_setup(char *str)
irqfixup = 1;
printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n");
printk(KERN_WARNING "This may impact system performance.\n");
+
return 1;
}
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