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Date: Fri, 5 May 2017 12:16:11 -0400
From: Tejun Heo <tj@...nel.org>
To: Tycho Andersen <tycho@...ker.com>
Cc: Juerg Haefliger <juerg.haefliger@....com>,
Christoph Hellwig <hch@...radead.org>, linux-ide@...r.kernel.org,
linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com
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 <hch@...radead.org>
> Signed-off-by: Tycho Andersen <tycho@...ker.com>
> CC: Juerg Haefliger <juerg.haefliger@....com>
> CC: Tejun Heo <tj@...nel.org>
>
> [1]: https://lkml.org/lkml/2016/11/4/245
> [2]: https://lkml.org/lkml/2016/11/4/253
Yeah, it's a nice cleanup.
Applied to libata/for-4.13.
Thanks.
--
tejun
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