From 7cded342c09f633666e71ee1ce048f218a9c5836 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 13 May 2015 14:33:22 +0200
Subject: [PATCH] s390/mm: correct return value of pmd_pfn

Git commit 152125b7a882df36a55a8eadbea6d0edf1461ee7
"s390/mm: implement dirty bits for large segment table entries"
broke the pmd_pfn function, it changed the return value from
'unsigned long' to 'int'. This breaks all machine configurations
with memory above the 8TB line.

Cc: stable@vger.kernel.org # 3.17+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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