linux-kernel - Re: [patch 2/4] timers: Consolidate base->next

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Message-ID: <87likbxzqe.fsf@abhimanyu.in.ibm.com>
Date:	Tue, 29 May 2012 12:04:01 +0530
From:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [patch 2/4] timers: Consolidate base->next_timer update

> 
> -static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
> +static void
> +__internal_add_timer(struct tvec_base *base, struct timer_list *timer)
>  {
>  	unsigned long expires = timer->expires;
>  	unsigned long idx = expires - base->timer_jiffies;
> @@ -372,6 +373,17 @@ static void internal_add_timer(struct tv
>  	list_add_tail(&timer->entry, vec);
>  }
> 
> +static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
> +{
> +	__internal_add_timer(base, timer);
> +	/*
> +	 * Update base->next_timer if this is the earliest one.
> +	 */
> +	if (time_before(timer->expires, base->next_timer) &&
> +	    !tbase_get_deferrable(timer->base))
> +		base->next_timer = timer->expires;
> +}
> +
>
Shouldn't this be like this?

+	/*
+	 * Update base->next_timer if this is the earliest one.
+	 */
+	if (time_before(timer->expires, base->next_timer) &&
+	    !tbase_get_deferrable(timer->base))
+		base->next_timer = timer->expires;
+	__internal_add_timer(base, timer);

As per the below code?

>  #ifdef CONFIG_TIMER_STATS
>  void __timer_stats_timer_set_start_info(struct timer_list *timer, void *addr)
>  {
> @@ -757,9 +769,6 @@ __mod_timer(struct timer_list *timer, un
>  	}
> 
>  	timer->expires = expires;
> -	if (time_before(timer->expires, base->next_timer) &&
> -	    !tbase_get_deferrable(timer->base))
> -		base->next_timer = timer->expires;
>  	internal_add_timer(base, timer);
> 

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