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Commit b7d14f3a authored by Martin Schwidefsky's avatar Martin Schwidefsky
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s390/mm: correct transfer of dirty & young bits in __pmd_to_pte 



The dirty & young bit from the pmd is not copied correctly to the
pseudo pte in __pmd_to_pte. In fact it is not copied at all, the
bits get lost. As the old style huge page currently does not need
the dirty & young information this has no effect, but may be needed
in the future.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 77a87f0c

arch/s390/mm/hugetlbpage.c

+2 −2
Original line number Diff line number Diff line
@@ -70,8 +70,8 @@ static inline pte_t __pmd_to_pte(pmd_t pmd) 
		pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) << 4;

		pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_INVALID) << 5;

		pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_PROTECT);

		pmd_val(pmd) |= (pte_val(pte) & _PAGE_DIRTY) << 10;

		pmd_val(pmd) |= (pte_val(pte) & _PAGE_YOUNG) << 10;

		pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) >> 10;

		pte_val(pte) |= (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) >> 10;

	} else

		pte_val(pte) = _PAGE_INVALID;

	return pte;