[PATCH] rtc-cmos.c: Build fix

[Carlos R . Mafra]

The function hpet_rtc_interrupt(..) is to be used only if CONFIG_HPET_EMULATE_RTC
is defined (see arch/x86/kernel/hpet.c), so we define it to return 0 when
!CONFIG_HPET_EMULATE_RTC to avoid build failures. 

This function will never be used anyways when !CONFIG_HPET_EMULATE_RTC because 
it is inside a if(is_hpet_enabled()) which is never true when
!CONFIG_HPET_EMULATE_RTC.

Signed-off-by: Carlos R. Mafra <crmafra@xxxxxxxxxxxx>
---
 drivers/char/rtc.c     |    2 --
 drivers/rtc/rtc-cmos.c |    5 ++++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 5f80a9d..31d09ea 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -119,8 +119,6 @@ static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id)
 	return 0;
 }
 #endif
-#else
-extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 #endif
 
 /*
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index d060a06..12046bb 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -52,7 +52,10 @@
 #define hpet_rtc_timer_init() 			do { } while (0)
 #define hpet_register_irq_handler(h) 		0
 #define hpet_unregister_irq_handler(h)		do { } while (0)
-extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
+static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id)
+{
+	return 0;
+}
 #endif
 
 struct cmos_rtc {
-- 
1.5.4.3


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