linux-kernel - Re: [PATCH] x86: make e820_end return end_of

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Date:	Thu, 10 Jul 2008 09:00:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [PATCH] x86: make e820_end return end_of_ram again for 64bit


* Yinghai Lu <yhlu.kernel@...il.com> wrote:

> even for 64bit system with less 4G, we can use fixmap to handle acpi 
> sit near end of ram

ok - applied to tip/x86/core - lets see whether Suresh's system now 
works fine with this change.

> change e820_end to e820_end_of_ram again?
> or e820_ram_pfn?

i'd suggest e820_end_of_ram_pfn().

we now have symmetric behavior on 32-bit and 64-bit, e820_end() returns 
the true end of RAM. (64-bit used to return the last PFN mentioned in 
the e820 map - i.e. ACPI tables and other end of RAM items could have 
been included)

	Ingo
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