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Date: Fri, 8 Sep 2017 00:53:47 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Tycho Andersen <tycho@...ker.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	kernel-hardening@...ts.openwall.com,
	Marco Benatto <marco.antonio.780@...il.com>,
	Juerg Haefliger <juerg.haefliger@...onical.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v6 05/11] arm64/mm: Add support for XPFO

> +/*
> + * Lookup the page table entry for a virtual address and return a pointer to
> + * the entry. Based on x86 tree.
> + */
> +static pte_t *lookup_address(unsigned long addr)

Seems like this should be moved to common arm64 mm code and used by
kernel_page_present.

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