From: Andrew Morton <akpm@osdl.org>

DECLARE_PER_CPU needs percpu.h

Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 include/asm-x86_64/hw_irq.h |    1 +
 1 file changed, 1 insertion(+)

diff -puN include/asm-x86_64/hw_irq.h~genirq-x86_64-irq-make-vector_irq-per-cpu-fix include/asm-x86_64/hw_irq.h
--- a/include/asm-x86_64/hw_irq.h~genirq-x86_64-irq-make-vector_irq-per-cpu-fix
+++ a/include/asm-x86_64/hw_irq.h
@@ -19,6 +19,7 @@
 #include <asm/irq.h>
 #include <linux/profile.h>
 #include <linux/smp.h>
+#include <linux/percpu.h>
 #endif
 
 #define NMI_VECTOR		0x02
_