linux-kernel - Re: [PATCH 03/14] powerpc: use printk

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Message-ID: <4A800B08.4020708@mlbassoc.com>
Date:	Mon, 10 Aug 2009 05:56:56 -0600
From:	Gary Thomas <gary@...assoc.com>
To:	michael@...erman.id.au
CC:	Wolfram Sang <w.sang@...gutronix.de>, linuxppc-dev@...abs.org,
	Paul Mackerras <paulus@...ba.org>,
	Marcin Slusarz <marcin.slusarz@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/14] powerpc: use printk_once

Michael Ellerman wrote:
> On Mon, 2009-08-10 at 10:00 +0200, Wolfram Sang wrote:
>> On Sun, Aug 09, 2009 at 09:53:58PM +0200, Marcin Slusarz wrote:
>>> Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>
>>> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
>>> Cc: Paul Mackerras <paulus@...ba.org>
>>> Cc: linuxppc-dev@...abs.org
>>> ---
>>>  arch/powerpc/kernel/iommu.c      |    6 +-----
>>>  arch/powerpc/kernel/irq.c        |    5 ++---
>>>  arch/powerpc/sysdev/ppc4xx_pci.c |    9 ++-------
>>>  3 files changed, 5 insertions(+), 15 deletions(-)
>>>
>>> diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
>>> index fd51578..c7fa258 100644
>>> --- a/arch/powerpc/kernel/iommu.c
>>> +++ b/arch/powerpc/kernel/iommu.c
>>> @@ -502,7 +502,6 @@ static void iommu_table_clear(struct iommu_table *tbl)
>>>  struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid)
>>>  {
>>>  	unsigned long sz;
>>> -	static int welcomed = 0;
>>>  	struct page *page;
>>>  
>>>  	/* Set aside 1/4 of the table for large allocations. */
>>> @@ -523,11 +522,8 @@ struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid)
>>>  
>>>  	iommu_table_clear(tbl);
>>>  
>>> -	if (!welcomed) {
>>> -		printk(KERN_INFO "IOMMU table initialized, virtual merging %s\n",
>>> +	printk_once(KERN_INFO "IOMMU table initialized, virtual merging %s\n",
>>>  		       novmerge ? "disabled" : "enabled");
>>> -		welcomed = 1;
>>> -	}
>>>  
>>>  	return tbl;
>>>  }
>>> diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
>>> index f7f376e..05ebd21 100644
>>> --- a/arch/powerpc/kernel/irq.c
>>> +++ b/arch/powerpc/kernel/irq.c
>>> @@ -231,7 +231,6 @@ skip:
>>>  void fixup_irqs(cpumask_t map)
>>>  {
>>>  	unsigned int irq;
>>> -	static int warned;
>>>  
>>>  	for_each_irq(irq) {
>>>  		cpumask_t mask;
>>> @@ -246,8 +245,8 @@ void fixup_irqs(cpumask_t map)
>>>  		}
>>>  		if (irq_desc[irq].chip->set_affinity)
>>>  			irq_desc[irq].chip->set_affinity(irq, &mask);
>>> -		else if (irq_desc[irq].action && !(warned++))
>>> -			printk("Cannot set affinity for irq %i\n", irq);
>>> +		else if (irq_desc[irq].action)
>>> +			printk_once("Cannot set affinity for irq %i\n", irq);
>> Maybe we should add a loglevel to this printk (and the other one in fix_irqs)
>> while we are here?
> 
> I think you should drop it, it's stupid. If we actually care about irqs
> that don't have a set affinity we should keep a count and report that at
> the end of the loop.

In addition, this change would prevent reporting missing
affinity on more than one IRQ if there were such.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------
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