linux-kernel - Re: [PATCH V4 1/2] mm: Update generic gup implementation to handle hugepage directory

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Message-Id: <20141101.140554.427928361730485371.davem@davemloft.net>
Date:	Sat, 01 Nov 2014 14:05:54 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	aneesh.kumar@...ux.vnet.ibm.com
Cc:	akpm@...ux-foundation.org, steve.capper@...aro.org,
	aarcange@...hat.com, benh@...nel.crashing.org, mpe@...erman.id.au,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH V4 1/2] mm: Update generic gup implementation to handle
 hugepage directory

From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Date: Wed, 29 Oct 2014 13:49:44 +0530

> +/*
> + * Some architectures requires a hugepage directory format that is
> + * required to support multiple hugepage sizes. For example
> + * a4fe3ce7699bfe1bd88f816b55d42d8fe1dac655 introduced the same
> + * on powerpc. This allows for a more flexible hugepage pagetable
> + * layout.
> + */

Please don't put commit IDs into the actual code.

If that commit gets backported to -stable or another tree, then this
comment will send someone on a wild goose chase.
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