linux-kernel - Re: [PATCH] ARM: mm: Fix ECC mem policy printk

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Date:	Wed, 30 Oct 2013 13:07:28 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Michal Simek <michal.simek@...inx.com>
Cc:	Will Deacon <will.deacon@....com>,
	linux-arm-kernel@...ts.infradead.org, monstr@...str.eu,
	Nicolas Pitre <nico@...aro.org>,
	Vitaly Andrianov <vitalya@...com>,
	Cyril Chemparathy <cyril@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: mm: Fix ECC mem policy printk

On Wed, Oct 30, 2013 at 01:46:18PM +0100, Michal Simek wrote:
> Russell, Will: We discussed this at KS that will be good
> to rephrase it or have different logic around this.
> I am not sure if we can also test that this bit is
> implemented by particular SoC or not.
> 
> Maybe logic should be that if SoC uses this bit
> that message is shown in origin format to declare
> that ECC is enabled or disabled.
> When SoC doesn't implement it then do not show this message.

This is not quite what I meant - by making the change you have, you also
omit to print the data cache policy.

> @@ -556,8 +556,9 @@ static void __init build_mem_type_table(void)
>  		mem_types[MT_CACHECLEAN].prot_sect |= PMD_SECT_WB;
>  		break;
>  	}
> -	printk("Memory policy: ECC %sabled, Data cache %s\n",
> -		ecc_mask ? "en" : "dis", cp->policy);
> +	if (ecc_mask)
> +		pr_info("Memory policy: ECC enabled, Data cache %s\n",
> +			cp->policy);

	pr_info("Memory policy: %sData cache %s\n",
		ecc_mask ? "ECC enabled, " : "", cp->policy);

is more what I was suggesting.
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