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Date: Thu, 14 Aug 2014 09:16:14 +0200
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Michael Kerrisk <mtk.manpages@gmail.com>,
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        Christian Borntraeger <borntraeger@de.ibm.com>,
        linux-s390@vger.kernel.org,
        Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH v14 5/8] s390: add pmd_[dirty|mkclean] for THP
Message-ID: <20140814091614.4a0d5178@mschwide>
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On Thu, 14 Aug 2014 10:53:29 +0900
Minchan Kim <minchan@kernel.org> wrote:

> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent
> overwrite of the contents since MADV_FREE syscall is called for
> THP page but for s390 pmds only referenced bit is available
> because there is no free bit left in the pmd entry for the
> software dirty bit so this patch adds dumb pmd_dirty which
> returns always true by suggesting by Martin.
> 
> They finally find a solution in future.
> http://marc.info/?l=linux-api&m=140440328820808&w=2

The solution is already there, see git commit 152125b7a882df36.
You can drop this patch.

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.