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Date: Wed, 20 Dec 2017 18:07:05 +0100
From: Greg KH <greg@kroah.com>
To: Steve Capper <steve.capper@arm.com>
Cc: stable@vger.kernel.org, Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH v3.18 backport] arm64: Initialise high_memory global
 variable earlier
Message-ID: <20171220170705.GD31793@kroah.com>
References: <20171218171105.29268-1-steve.capper@arm.com>
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On Mon, Dec 18, 2017 at 05:11:03PM +0000, Steve Capper wrote:
> Commit f24e5834a2c3f6c5f814a417f858226f0a010ade upstream.
> 
> The high_memory global variable is used by
> cma_declare_contiguous(.) before it is defined.
> 
> We don't notice this as we compute __pa(high_memory - 1), and it looks
> like we're processing a VA from the direct linear map.
> 
> This problem becomes apparent when we flip the kernel virtual address
> space and the linear map is moved to the bottom of the kernel VA space.
> 
> This patch moves the initialisation of high_memory before it used.

Thanks for all 3 of these, now queued up.

greg k-h