The warning in ack_bad_irq() is misleading in several ways:
* the term "vector" isn't quite correct
* the printing format isn't consistent across the archs: some print decimal,
  some hex, some hex w/o 0x prefix.
* the printed linux irq isn't meaningful in all cases - we actually would
  want it to print the hw irq.

Since all call sites already print out more detailed and correct information,
we just don't need to duplicate this in each single arch. So just drop it.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
 arch/mips/include/asm/hardirq.h | 3 +--
 arch/mips/kernel/irq.c          | 9 ---------
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/arch/mips/include/asm/hardirq.h b/arch/mips/include/asm/hardirq.h
index c977a86c2c65..75444120e6cb 100644
--- a/arch/mips/include/asm/hardirq.h
+++ b/arch/mips/include/asm/hardirq.h

@@ -10,8 +10,7 @@
 #ifndef _ASM_HARDIRQ_H
 #define _ASM_HARDIRQ_H
 
-extern void ack_bad_irq(unsigned int irq);
-#define ack_bad_irq ack_bad_irq
+#define ack_bad_irq(irq)
 
 #include <asm-generic/hardirq.h>
 

diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 85b6c60f285d..c98be305fab6 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c

@@ -27,15 +27,6 @@
 
 void *irq_stack[NR_CPUS];
 
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
-	printk("unexpected IRQ # %d\n", irq);
-}
-
 atomic_t irq_err_count;
 
 int arch_show_interrupts(struct seq_file *p, int prec)

-- 
2.11.0