diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/autoprobe.c | 16 | ||||
| -rw-r--r-- | kernel/irq/handle.c | 4 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 29 | ||||
| -rw-r--r-- | kernel/irq/spurious.c | 23 |
4 files changed, 34 insertions, 38 deletions
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index d1f1e6f10a23..d6eab98a3173 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 6b313ccf0edd..f9c33a86cbdf 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 c53662edc73d..261906ebdf04 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 ea3ceed362da..5eae7bf3c347 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; } |