diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 32f215825e8d..0578f8387603 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -887,10 +887,6 @@ void altivec_unavailable_exception(struct pt_regs *regs)
 	die("Unrecoverable VMX/Altivec Unavailable Exception", regs, SIGABRT);
 }
 
-#ifdef CONFIG_PPC64
-extern perf_irq_t perf_irq;
-#endif
-
 #if defined(CONFIG_PPC64) || defined(CONFIG_E500)
 void performance_monitor_exception(struct pt_regs *regs)
 {
diff --git a/include/asm-powerpc/pmc.h b/include/asm-powerpc/pmc.h
index 2f3c3fc2b796..5f41f3a2b293 100644
--- a/include/asm-powerpc/pmc.h
+++ b/include/asm-powerpc/pmc.h
@@ -22,6 +22,7 @@
 #include <asm/ptrace.h>
 
 typedef void (*perf_irq_t)(struct pt_regs *);
+extern perf_irq_t perf_irq;
 
 int reserve_pmc_hardware(perf_irq_t new_perf_irq);
 void release_pmc_hardware(void);