x86: HPET: convert WARN_ON to WARN_ON_ONCE

It is possible to flood the console with call traces if the WARN_ON
condition is true because of the frequency with which this function is
called.

Signed-off-by: Matt Fleming <mjf@gentoo.org>
Cc: mingo@elte.hu
Cc: venkatesh.pallipadi@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 77017e834cf7..f10f9461a43d 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -322,7 +322,7 @@ static int hpet_next_event(unsigned long delta,
          * what we wrote hit the chip before we compare it to the
          * counter.
          */
-        WARN_ON((u32)hpet_readl(HPET_T0_CMP) != cnt);
+        WARN_ON_ONCE((u32)hpet_readl(HPET_T0_CMP) != cnt);
 
         return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
 }