linux-kernel - Re: [patch 10/16] parisc: Replace old style lock init

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Date:	Sun, 8 Nov 2009 00:06:14 -0500
From:	Kyle McMartin <kyle@...artin.ca>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Kyle McMartin <kyle@...artin.ca>, linux-parisc@...r.kernel.org
Subject: Re: [patch 10/16] parisc: Replace old style lock init

On Fri, Nov 06, 2009 at 10:41:51PM -0000, Thomas Gleixner wrote:
> SPIN_LOCK_UNLOCKED is deprecated. Init the per cpu locks at runtime
> instead.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Kyle McMartin <kyle@...artin.ca>
> Cc: linux-parisc@...r.kernel.org

applied with one nit.

>  
> -DEFINE_SPINLOCK(smp_lock);
> -

You forgot to mention this was unused. :) Confused me for a while.

cheers, Kyle

>  volatile struct task_struct *smp_init_current_idle_task;
>  
>  /* track which CPU is booting */
> @@ -69,7 +67,7 @@ static volatile int cpu_now_booting __cp
>  
>  static int parisc_max_cpus __cpuinitdata = 1;
>  
> -DEFINE_PER_CPU(spinlock_t, ipi_lock) = SPIN_LOCK_UNLOCKED;
> +static DEFINE_PER_CPU(spinlock_t, ipi_lock);
>  
>  enum ipi_message_type {
>  	IPI_NOP=0,
> @@ -438,6 +436,11 @@ void __init smp_prepare_boot_cpu(void)
>  */
>  void __init smp_prepare_cpus(unsigned int max_cpus)
>  {
> +	int cpu;
> +
> +	for_each_possible_cpu(cpu)
> +		spin_lock_init(&per_cpu(ipi_lock, cpu));
> +
>  	init_cpu_present(cpumask_of(0));
>  
>  	parisc_max_cpus = max_cpus;
> 
> 
> 
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