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Diffstat (limited to 'arch/powerpc/kernel/irq.c')
-rw-r--r--arch/powerpc/kernel/irq.c50
1 files changed, 43 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 5b428e308666..d281fb6f12f3 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -157,12 +157,6 @@ notrace void arch_local_irq_restore(unsigned long en)
if (get_hard_enabled())
return;
-#if defined(CONFIG_BOOKE) && defined(CONFIG_SMP)
- /* Check for pending doorbell interrupts and resend to ourself */
- if (cpu_has_feature(CPU_FTR_DBELL))
- smp_muxed_ipi_resend();
-#endif
-
/*
* Need to hard-enable interrupts here. Since currently disabled,
* no need to take further asm precautions against preemption; but
@@ -457,11 +451,18 @@ static inline void do_softirq_onstack(void)
curtp = current_thread_info();
irqtp = softirq_ctx[smp_processor_id()];
irqtp->task = curtp->task;
+ irqtp->flags = 0;
current->thread.ksp_limit = (unsigned long)irqtp +
_ALIGN_UP(sizeof(struct thread_info), 16);
call_do_softirq(irqtp);
current->thread.ksp_limit = saved_sp_limit;
irqtp->task = NULL;
+
+ /* Set any flag that may have been set on the
+ * alternate stack
+ */
+ if (irqtp->flags)
+ set_bits(irqtp->flags, &curtp->flags);
}
void do_softirq(void)
@@ -750,7 +751,7 @@ unsigned int irq_create_mapping(struct irq_host *host,
if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
- printk(KERN_DEBUG "irq: irq %lu on host %s mapped to virtual irq %u\n",
+ pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n",
hwirq, host->of_node ? host->of_node->full_name : "null", virq);
return virq;
@@ -882,6 +883,41 @@ unsigned int irq_find_mapping(struct irq_host *host,
}
EXPORT_SYMBOL_GPL(irq_find_mapping);
+#ifdef CONFIG_SMP
+int irq_choose_cpu(const struct cpumask *mask)
+{
+ int cpuid;
+
+ if (cpumask_equal(mask, cpu_all_mask)) {
+ static int irq_rover;
+ static DEFINE_RAW_SPINLOCK(irq_rover_lock);
+ unsigned long flags;
+
+ /* Round-robin distribution... */
+do_round_robin:
+ raw_spin_lock_irqsave(&irq_rover_lock, flags);
+
+ irq_rover = cpumask_next(irq_rover, cpu_online_mask);
+ if (irq_rover >= nr_cpu_ids)
+ irq_rover = cpumask_first(cpu_online_mask);
+
+ cpuid = irq_rover;
+
+ raw_spin_unlock_irqrestore(&irq_rover_lock, flags);
+ } else {
+ cpuid = cpumask_first_and(mask, cpu_online_mask);
+ if (cpuid >= nr_cpu_ids)
+ goto do_round_robin;
+ }
+
+ return get_hard_smp_processor_id(cpuid);
+}
+#else
+int irq_choose_cpu(const struct cpumask *mask)
+{
+ return hard_smp_processor_id();
+}
+#endif
unsigned int irq_radix_revmap_lookup(struct irq_host *host,
irq_hw_number_t hwirq)