linux-kernel - Re: [PATCH 02/14] arm64: Handle section maps for swapper/idmap

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Date:	Wed, 2 Sep 2015 12:00:52 +0200
From:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:	"Suzuki K. Poulose" <Suzuki.Poulose@....com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KVM devel mailing list <kvm@...r.kernel.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	Mark Rutland <Mark.Rutland@....com>,
	Marc Zyngier <Marc.Zyngier@....com>
Subject: Re: [PATCH 02/14] arm64: Handle section maps for swapper/idmap

On 2 September 2015 at 11:42, Suzuki K. Poulose <Suzuki.Poulose@....com> wrote:
> On 02/09/15 10:38, Ard Biesheuvel wrote:
>>
>> On 13 August 2015 at 13:33, Suzuki K. Poulose <suzuki.poulose@....com>
>> wrote:
>>>
>>> From: "Suzuki K. Poulose" <suzuki.poulose@....com>
>>>
>>> We use section maps with 4K page size to create the
>>> swapper/idmaps. So far we have used !64K or 4K checks
>>> to handle the case where we use the section maps. This
>>> patch adds a symbol to make it clear those cases.
>>>
>>
>> That sentence does not make sense.
>
>
> I agree. How about :
>
> "This patch adds a new symbol, 'ARM64_SWAPPER_USES_SECTION_MAPS', to
> handle cases where we use section maps, instead of using the page size
> symbols."
>

Yep, much better
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