linux-kernel - Re: [PATCH 3/4] x86: ioremap: remove physical address warning message

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Date:	Fri, 11 Jun 2010 10:44:36 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, jbarnes@...tuousgeek.org
Subject: Re: [PATCH 3/4] x86: ioremap: remove physical address warning message

On 06/11/2010 02:20 AM, Kenji Kaneshige wrote:
> Current ioremap() code for x86 displays warning message if too high
> address to handle is passed. But this can happen as usual cases. For
> example, if 64-bit BAR is assigned to a PCI device and its device
> driver calls pci_iomap(). So this patch changes the warning messages
> as follows.
> 
> - Change printk message from KERN_WARNING to KERN_DEBUG
> - Remove WARN_ON_ONCE()
> 
> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
> 
> ---
>  arch/x86/mm/ioremap.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> Index: linux-2.6.34/arch/x86/mm/ioremap.c
> ===================================================================
> --- linux-2.6.34.orig/arch/x86/mm/ioremap.c	2010-06-10 07:28:31.966187993 +0900
> +++ linux-2.6.34/arch/x86/mm/ioremap.c	2010-06-10 07:28:33.146375380 +0900
> @@ -78,9 +78,8 @@
>  		return NULL;
>  
>  	if (!phys_addr_valid(phys_addr)) {
> -		printk(KERN_WARNING "ioremap: invalid physical address %llx\n",
> +		printk(KERN_DEBUG "ioremap: can't map physical address %llx\n",
>  		       (unsigned long long)phys_addr);
> -		WARN_ON_ONCE(1);
>  		return NULL;
>  	}
>  

Fair to change the message, but the priority level really seems way
insufficient.  I can see dropping the WARN_ON_ONCE() though.

	-hpa
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