[PATCH] asm-generic: hard_irqs: handle NR_IRQS > 256 automatically

[Mike Frysinger]

If we're going to automatically set HARDIRQ_BITS for the arch, might as
well be a little bit smart about it and set it to 9 automatically if
NR_IRQS is larger than 8 bits.

Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
---
 include/asm-generic/hardirq.h |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/include/asm-generic/hardirq.h b/include/asm-generic/hardirq.h
index 3d5d2c9..d93acec 100644
--- a/include/asm-generic/hardirq.h
+++ b/include/asm-generic/hardirq.h
@@ -12,7 +12,11 @@ typedef struct {
 #include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */
 
 #ifndef HARDIRQ_BITS
-#define HARDIRQ_BITS	8
+# if NR_IRQS > 256
+#  define HARDIRQ_BITS	9
+# else
+#  define HARDIRQ_BITS	8
+# endif
 #endif
 
 /*
-- 
1.6.3.1

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