genirq: Remove irq_reserve_irq[s]

No more users. And it's not going to come back. If you need
hotplugable irq chips, use irq domains.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-and-acked-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140507154340.302183048@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 0 insertions, 32 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index ac9634286f42..2110f46fcafa 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -617,18 +617,11 @@ int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
         irq_alloc_descs(-1, from, cnt, node)
 
 void irq_free_descs(unsigned int irq, unsigned int cnt);
-int irq_reserve_irqs(unsigned int from, unsigned int cnt);
-
 static inline void irq_free_desc(unsigned int irq)
 {
         irq_free_descs(irq, 1);
 }
 
-static inline int irq_reserve_irq(unsigned int irq)
-{
-        return irq_reserve_irqs(irq, 1);
-}
-
 #ifdef CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
 unsigned int irq_alloc_hwirqs(int cnt, int node);
 static inline unsigned int irq_alloc_hwirq(int node)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 24029348729b..d514ed6080e1 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -455,31 +455,6 @@ EXPORT_SYMBOL_GPL(irq_free_hwirqs);
 #endif
 
 /**
- * irq_reserve_irqs - mark irqs allocated
- * @from:       mark from irq number
- * @cnt:        number of irqs to mark
- *
- * Returns 0 on success or an appropriate error code
- */
-int irq_reserve_irqs(unsigned int from, unsigned int cnt)
-{
-        unsigned int start;
-        int ret = 0;
-
-        if (!cnt || (from + cnt) > nr_irqs)
-                return -EINVAL;
-
-        mutex_lock(&sparse_irq_lock);
-        start = bitmap_find_next_zero_area(allocated_irqs, nr_irqs, from, cnt, 0);
-        if (start == from)
-                bitmap_set(allocated_irqs, start, cnt);
-        else
-                ret = -EEXIST;
-        mutex_unlock(&sparse_irq_lock);
-        return ret;
-}
-
-/**
  * irq_get_next_irq - get next allocated irq number
  * @offset:     where to start the search
  *