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Date: Fri, 5 May 2017 12:16:11 -0400
From: Tejun Heo <>
To: Tycho Andersen <>
Cc: Juerg Haefliger <>,
	Christoph Hellwig <>,,,
Subject: Re: [PATCH v2] ata-sff: always map page before data transfer

On Thu, May 04, 2017 at 04:15:51PM -0600, Tycho Andersen wrote:
> The XPFO [1] patchset may unmap pages from physmap if they happened to be
> destined for userspace. If such a page is unmapped, it needs to be
> remapped. Rather than test if a page is in the highmem/xpfo unmapped state,
> Christoph suggested [2] that we simply always map the page.
> v2: * drop comment about bounce buffer
>     * don't save IRQs before kmap/unmap
>     * formatting
> Suggested-by: Christoph Hellwig <>
> Signed-off-by: Tycho Andersen <>
> CC: Juerg Haefliger <>
> CC: Tejun Heo <>
> [1]:
> [2]:

Yeah, it's a nice cleanup.

Applied to libata/for-4.13.



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