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s390/mm: fix pmd_pfn() for thp 

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>
This commit is contained in:
Gerald Schaefer 2013-01-09 18:49:51 +01:00 committed by Martin Schwidefsky
parent b719f43059
commit 171c4006fb
1 changed files with 1 additions and 4 deletions
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5
arch/s390/include/asm/pgtable.h
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@ -1387,10 +1387,7 @@ static inline int has_transparent_hugepage(void)
static inline unsigned long pmd_pfn(pmd_t pmd)
{
if (pmd_trans_huge(pmd))
return pmd_val(pmd) >> HPAGE_SHIFT;
else
return pmd_val(pmd) >> PAGE_SHIFT;
return pmd_val(pmd) >> PAGE_SHIFT;
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */