Subject: Re: [PATCH 03/14] powerpc: use printk_once

From: Michael Ellerman <[email-masked]>
Date: Mon, 10 Aug 2009 21:46:49 +1000

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 <[email-masked]>
> > Cc: Benjamin Herrenschmidt <[email-masked]>
> > Cc: Paul Mackerras <[email-masked]>
> > Cc: [email-masked]
> > ---
> >  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.

cheers