Get rid of the private allocator and switch over to sparse IRQs.
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: Chris Metcalf <cmetc...@tilera.com>
---
arch/tile/Kconfig | 2 +
arch/tile/include/asm/irq.h | 9 +++----
arch/tile/kernel/irq.c | 52 ++------------------------------------------
3 files changed, 9 insertions(+), 54 deletions(-)
Index: tip/arch/tile/Kconfig
===================================================================
--- tip.orig/arch/tile/Kconfig
+++ tip/arch/tile/Kconfig
@@ -125,6 +125,8 @@ config HVC_TILE
config TILEGX
bool "Building for TILE-Gx (64-bit) processor"
+ select SPARSE_IRQ
+ select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_FUNCTION_GRAPH_TRACER
Index: tip/arch/tile/include/asm/irq.h
===================================================================
--- tip.orig/arch/tile/include/asm/irq.h
+++ tip/arch/tile/include/asm/irq.h
@@ -18,10 +18,12 @@
#include <linux/hardirq.h>
/* The hypervisor interface provides 32 IRQs. */
-#define NR_IRQS 32
+#define NR_IRQS 32
/* IRQ numbers used for linux IPIs. */
-#define IRQ_RESCHEDULE 0
+#define IRQ_RESCHEDULE 0
+/* Interrupts for dynamic allocation start at 1. Let the core allocate irq0 */
+#define NR_IRQS_LEGACY 1
#define irq_canonicalize(irq) (irq)
@@ -76,7 +78,4 @@ void tile_irq_activate(unsigned int irq,
void setup_irq_regs(void);
-unsigned int irq_alloc_hwirq(int node);
-void irq_free_hwirq(unsigned int irq);
-
#endif /* _ASM_TILE_IRQ_H */
Index: tip/arch/tile/kernel/irq.c
===================================================================
--- tip.orig/arch/tile/kernel/irq.c
+++ tip/arch/tile/kernel/irq.c
@@ -54,13 +54,6 @@ static DEFINE_PER_CPU(unsigned long, irq
*/
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
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();
+ return irq >= NR_IRQS ? -EINVAL : 0;
}
+void arch_teardown_hwirq(unsigned int irq) { }
#endif
--
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