tile: Use SPARSE_IRQ

Get rid of the private allocator and switch over to sparse IRQs.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Link: http://lkml.kernel.org/r/20140507154338.423715783@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 49 deletions

diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
index 5fd197e0a2d4..637f2ffaa5f5 100644
--- a/arch/tile/kernel/irq.c
+++ b/arch/tile/kernel/irq.c
@@ -54,13 +54,6 @@ static DEFINE_PER_CPU(unsigned long, irq_disable_mask)
  */
 static DEFINE_PER_CPU(int, irq_depth);
 
-/* State for allocating IRQs on Gx. */
-#if CHIP_HAS_IPI()
-static unsigned long available_irqs = ((1UL << NR_IRQS) - 1) &
-				      (~(1UL << IRQ_RESCHEDULE));
-static DEFINE_SPINLOCK(available_irqs_lock);
-#endif
-
 #if CHIP_HAS_IPI()
 /* Use SPRs to manipulate device interrupts. */
 #define mask_irqs(irq_mask) __insn_mtspr(SPR_IPI_MASK_SET_K, irq_mask)
@@ -278,50 +271,11 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	return 0;
 }
 
-/*
- * Generic, controller-independent functions:
- */
-
 #if CHIP_HAS_IPI()
-int create_irq(void)
-{
-	unsigned long flags;
-	int result;
-
-	spin_lock_irqsave(&available_irqs_lock, flags);
-	if (available_irqs == 0)
-		result = -ENOMEM;
-	else {
-		result = __ffs(available_irqs);
-		available_irqs &= ~(1UL << result);
-		dynamic_irq_init(result);
-	}
-	spin_unlock_irqrestore(&available_irqs_lock, flags);
-
-	return result;
-}
-EXPORT_SYMBOL(create_irq);
-
-void destroy_irq(unsigned int irq)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&available_irqs_lock, flags);
-	available_irqs |= (1UL << irq);
-	dynamic_irq_cleanup(irq);
-	spin_unlock_irqrestore(&available_irqs_lock, flags);
-}
-EXPORT_SYMBOL(destroy_irq);
-
-unsigned int irq_alloc_hwirq(int node)
-{
-	int ret = create_irq();
-	return ret < 0 ? 0 : ret;
-}
-
-void irq_free_hwirq(unsigned int irq)
+int arch_setup_hwirq(unsigned int irq, int node)
 {
-	destroy_irq(irq);
+	return irq >= NR_IRQS ? -EINVAL : 0;
 }
 
+void arch_teardown_hwirq(unsigned int irq) { }
 #endif