[tip:irq/core] tile: Implement irq_alloc/free_hwirq() for migration

[tip-bot for Thomas Gleixner]

Commit-ID:  6ef40512c55b18f8fdf1074b2f2d7eadcd50fec7
Gitweb:     http://git.kernel.org/tip/6ef40512c55b18f8fdf1074b2f2d7eadcd50fec7
Author:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 7 May 2014 15:44:13 +0000
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 16 May 2014 14:05:20 +0200

tile: Implement irq_alloc/free_hwirq() for migration

We want to convert the drivers over to the new interface and finally
tile to sparse irqs. Implement irq_alloc/free_hwirq() for step by step
migration.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Grant Likely <grant.likely@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Acked-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140507154336.947853241@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/tile/include/asm/irq.h |  3 +++
 arch/tile/kernel/irq.c      | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/arch/tile/include/asm/irq.h b/arch/tile/include/asm/irq.h
index 33cff9a..9670a39 100644
--- a/arch/tile/include/asm/irq.h
+++ b/arch/tile/include/asm/irq.h
@@ -76,4 +76,7 @@ void tile_irq_activate(unsigned int irq, int tile_irq_type);
 
 void setup_irq_regs(void);
 
+unsigned int irq_alloc_hwirq(int node);
+void irq_free_hwirq(unsigned int irq);
+
 #endif /* _ASM_TILE_IRQ_H */
diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
index 906a76b..5fd197e 100644
--- a/arch/tile/kernel/irq.c
+++ b/arch/tile/kernel/irq.c
@@ -312,4 +312,16 @@ void destroy_irq(unsigned int 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)
+{
+	destroy_irq(irq);
+}
+
 #endif
--
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