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authorStuart Yoder <stuart.yoder@freescale.com>2011-05-19 08:54:26 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-06-22 21:44:59 -0500
commit6ec36b5848a8336d3a0010727b9365c3254d2d2e (patch)
tree7876f705354d8b6e73a6079b5bd6561f0b8e2cbd
parent47fe819e7555b31d24f8a11d9b2568d8f5de8b01 (diff)
powerpc: make irq_choose_cpu() available to all PIC drivers
Move irq_choose_cpu() into arch/powerpc/kernel/irq.c so that it can be used by other PIC drivers. The function is not MPIC-specific. Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--arch/powerpc/include/asm/irq.h2
-rw-r--r--arch/powerpc/kernel/irq.c35
-rw-r--r--arch/powerpc/sysdev/mpic.c36
3 files changed, 37 insertions, 36 deletions
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index 1bff591f7f72..c57a28e52b64 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -330,5 +330,7 @@ extern int call_handle_irq(int irq, void *p1,
struct thread_info *tp, void *func);
extern void do_IRQ(struct pt_regs *regs);
+int irq_choose_cpu(const struct cpumask *mask);
+
#endif /* _ASM_IRQ_H */
#endif /* __KERNEL__ */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 5b428e308666..38dd10e2841d 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -882,6 +882,41 @@ 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)
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 3f995dcf95c9..d3bc7e595d0b 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -597,42 +597,6 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
#endif /* CONFIG_MPIC_U3_HT_IRQS */
-#ifdef CONFIG_SMP
-static int irq_choose_cpu(const struct cpumask *mask)
-{
- int cpuid;
-
- if (cpumask_equal(mask, cpu_all_mask)) {
- static int irq_rover = 0;
- 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
-static int irq_choose_cpu(const struct cpumask *mask)
-{
- return hard_smp_processor_id();
-}
-#endif
-
/* Find an mpic associated with a given linux interrupt */
static struct mpic *mpic_find(unsigned int irq)
{