linux-kernel - Re: [PATCH 7/7] acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context.

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Message-ID: <20140514171321.GG5231@pd.tnic>
Date:	Wed, 14 May 2014 19:13:21 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Cc:	rjw@...ysocki.net, lenb@...nel.org, tony.luck@...el.com,
	bp@...e.de, m.chehab@...sung.com, linux-edac@...r.kernel.org,
	x86@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org
Subject: Re: [PATCH 7/7] acpi, apei, ghes: Factor out ioremap virtual memory
 for IRQ and NMI context.

On Wed, Apr 09, 2014 at 05:14:35PM +0200, Tomasz Nowicki wrote:
> @@ -310,6 +310,8 @@ static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
>  	u64 offset;
>  	u32 trunk;
>  
> +	BUG_ON(in_nmi && !IS_ENABLED(CONFIG_ACPI_APEI_NMI));
> +

That's a good idea but it should be in the NMI notifier
ghes_notify_nmi() instead and simpler:

	BUG_ON(!IS_ENABLED(CONFIG_ACPI_APEI_NMI));

>  	while (len > 0) {
>  		offset = paddr - (paddr & PAGE_MASK);
>  		if (in_nmi) {

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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