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s390/mm: fix pmd_pfn() for thp
authorGerald Schaefer <gerald.schaefer@de.ibm.com>
Wed, 9 Jan 2013 17:49:51 +0000 (18:49 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Sat, 12 Jan 2013 17:49:25 +0000 (18:49 +0100)
The pfn calculation in pmd_pfn() is broken for thp, because it uses
HPAGE_SHIFT instead of the normal PAGE_SHIFT. This is fixed by removing
the distinction between thp and normal pmds in that function, and always
using PAGE_SHIFT.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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