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Date: Tue, 2 Aug 2016 11:01:50 -0700
From: Yinghai Lu <>
To: "Rafael J. Wysocki" <>
Cc: Thomas Garnier <>, Ingo Molnar <>, 
	Thomas Gleixner <>, "H . Peter Anvin" <>, Kees Cook <>, 
	Pavel Machek <>, "the arch/x86 maintainers" <>, 
	Linux Kernel Mailing List <>, Linux PM list <>, 
	"" <>
Subject: Re: [PATCH v1 1/2] x86/power/64: Support unaligned addresses for
 temporary mapping

On Mon, Aug 1, 2016 at 5:36 PM, Rafael J. Wysocki <> wrote:
> On Monday, August 01, 2016 10:07:59 AM Thomas Garnier wrote:
>> Correctly setup the temporary mapping for hibernation. Previous
>> implementation assumed the address was aligned on the PGD level. With
>> KASLR memory randomization enabled, the address is randomized on the PUD
>> level. This change supports unaligned address up to PMD.
> This code is shared with kexec AFAICS, so it likely is better to push it
> through tip rather than through the PM tree.

Only calling path via arch/x86/power/hibernate_64.c have
   kernel_mapping = true;
other two paths: arch/x86/boot/compressed/pagetable.c and
all have kernel_mapping as false.

maybe that path need simplified kernel_physical_mapping_init() instead?



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