linux-kernel - [PATCH V2 36/36] timer: don't emulate notifier call to initialize timer base

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Date:	Fri,  4 Apr 2014 12:06:19 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	tglx@...utronix.de
Cc:	linaro-kernel@...ts.linaro.org, fweisbec@...il.com,
	linaro-networking@...aro.org, Arvind.Chauhan@....com,
	linux-kernel@...r.kernel.org,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH V2 36/36] timer: don't emulate notifier call to initialize timer base

In init_timers() we need to call init_timers_cpu() for boot cpu. For this,
currently we are emulating a call to hotplug notifier. Probably this was done
initially to get rid of code redundancy. But this sequence always called a
single routine, i.e. init_timers_cpu(), and so calling that routine directly
would be better. This would get rid of emulating a notifier call, few typecasts
and the extra steps we are doing in notifier callback.

So, this patch calls init_timers_cpu() directly from init_timers().

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 kernel/timer.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/kernel/timer.c b/kernel/timer.c
index 4360edc..d13eb56 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1666,15 +1666,9 @@ static struct notifier_block timers_nb = {
 
 void __init init_timers(void)
 {
-	int err;
-
 	/* ensure there are enough low bits for flags in timer->base pointer */
 	BUILD_BUG_ON(__alignof__(struct tvec_base) & TIMER_FLAG_MASK);
-
-	err = timer_cpu_notify(&timers_nb, (unsigned long)CPU_UP_PREPARE,
-			       (void *)(long)smp_processor_id());
-	BUG_ON(err != NOTIFY_OK);
-
+	BUG_ON(init_timers_cpu(smp_processor_id()));
 	init_timer_stats();
 	register_cpu_notifier(&timers_nb);
 	open_softirq(TIMER_SOFTIRQ, run_timer_softirq);
-- 
1.7.12.rc2.18.g61b472e

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