linux-kernel - Re: [PATCH v5 13/14] x86: reserve setup_data ranges late after parsing memmap cmdline

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Message-ID: <20131213200455.GB12466@pd.tnic>
Date:	Fri, 13 Dec 2013 21:04:55 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Young <dyoung@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, greg@...ah.com, matt@...sole-pimps.org,
	toshi.kani@...com
Subject: Re: [PATCH v5 13/14] x86: reserve setup_data ranges late after
 parsing memmap cmdline

On Mon, Dec 09, 2013 at 05:42:26PM +0800, Dave Young wrote:
> Currently e820_reserve_setup_data is called before parsing early params,
> it works in normal case. But for memmap=exactmap, the final memory ranges
> are created after parsing memmap= cmdline params, so the previous
> e820_reserve_setup_data has no effect. For example, setup_data ranges
> will still be marked as normal system ram, thus when later sysfs driver
> ioremap them kernel will warn about mapping normal ram.
> 
> This patch fix it by moving the e820_reserve_setup_data callback after
> parsing early params so they can be set as reserved ranges and later
> ioremap will be fine with it.
> 
> changes:
> Boris: improve patch description
> 
> Signed-off-by: Dave Young <dyoung@...hat.com>

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

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