linux-kernel - [PATCH] time/cpuidle:Fixup fallout from hrtimer broadcast mode inclusion

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Date:	Fri, 07 Feb 2014 22:59:24 +0530
From:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
To:	tglx@...utronix.de, fengguang.wu@...el.com
Cc:	mingo@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] time/cpuidle:Fixup fallout from hrtimer broadcast mode
 inclusion

The broadcast timer registration has to be done only when
GENERIC_CLOCKEVENTS_BROADCAST and TICK_ONESHOT config options are enabled.
Also fix max_delta_ticks value for the pseudo clock device.

Reported-by: Fengguang Wu <fengguang.wu@...el.com>
Signed-off-by: Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...nel.org>
---

 kernel/time/tick-broadcast-hrtimer.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/time/tick-broadcast-hrtimer.c b/kernel/time/tick-broadcast-hrtimer.c
index 5591aaa..bc383ac 100644
--- a/kernel/time/tick-broadcast-hrtimer.c
+++ b/kernel/time/tick-broadcast-hrtimer.c
@@ -81,7 +81,7 @@ static struct clock_event_device ce_broadcast_hrtimer = {
 	.min_delta_ns		= 1,
 	.max_delta_ns		= KTIME_MAX,
 	.min_delta_ticks	= 1,
-	.max_delta_ticks	= KTIME_MAX,
+	.max_delta_ticks	= ULONG_MAX,
 	.mult			= 1,
 	.shift			= 0,
 	.cpumask		= cpu_all_mask,
@@ -102,9 +102,11 @@ static enum hrtimer_restart bc_handler(struct hrtimer *t)
 	return HRTIMER_RESTART;
 }
 
+#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
 void tick_setup_hrtimer_broadcast(void)
 {
 	hrtimer_init(&bctimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 	bctimer.function = bc_handler;
 	clockevents_register_device(&ce_broadcast_hrtimer);
 }
+#endif

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