linux-kernel - Re: [PATCH v2] sparc64: Fix gup_huge

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Message-Id: <20170625.152434.163343347007478148.davem@davemloft.net>
Date:   Sun, 25 Jun 2017 15:24:34 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     nitin.m.gupta@...cle.com
Cc:     julian.calaby@...il.com, lstoakes@...il.com, jack@...e.cz,
        mhocko@...e.com, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] sparc64: Fix gup_huge_pmd

From: Nitin Gupta <nitin.m.gupta@...cle.com>
Date: Thu, 22 Jun 2017 17:15:08 -0700

> The function assumes that each PMD points to head of a
> huge page. This is not correct as a PMD can point to
> start of any 8M region with a, say 256M, hugepage. The
> fix ensures that it points to the correct head of any PMD
> huge page.
> 
> Cc: Julian Calaby <julian.calaby@...il.com>
> Signed-off-by: Nitin Gupta <nitin.m.gupta@...cle.com>
> ---
>  Changes since v1
>  - Clarify use of 'head' variable (Julian Calaby)

Applied and queued up for -stable, thanks.