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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2010-10-25 16:10:36 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:19 +0200 |
| commit | 84afdcee620b1640f2a145c07febae4ed68947f9 (patch) | |
| tree | 7e0e400264659064ebabc395b991d50008f35bf0 /arch/s390/include/asm/pgtable.h | |
| parent | 36bf96801e3a2c4efae0bb8c1897a530fc9ca13e (diff) | |
| download | linux-84afdcee620b1640f2a145c07febae4ed68947f9.tar.gz linux-84afdcee620b1640f2a145c07febae4ed68947f9.tar.bz2 linux-84afdcee620b1640f2a145c07febae4ed68947f9.zip | |
[S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.h
All architectures besides s390 have pte_mkhuge() defined in pgtable.h.
So move the function to pgtable.h on s390 as well.
Fixes a compile error introduced with "hugetlb: hugepage migration core"
in linux-next which only happens on s390.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index f79e7bb9ae1e..986dc9476c21 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -772,6 +772,34 @@ static inline pte_t pte_mkspecial(pte_t pte) return pte; } +#ifdef CONFIG_HUGETLB_PAGE +static inline pte_t pte_mkhuge(pte_t pte) +{ + /* + * PROT_NONE needs to be remapped from the pte type to the ste type. + * The HW invalid bit is also different for pte and ste. The pte + * invalid bit happens to be the same as the ste _SEGMENT_ENTRY_LARGE + * bit, so we don't have to clear it. + */ + if (pte_val(pte) & _PAGE_INVALID) { + if (pte_val(pte) & _PAGE_SWT) + pte_val(pte) |= _HPAGE_TYPE_NONE; + pte_val(pte) |= _SEGMENT_ENTRY_INV; + } + /* + * Clear SW pte bits SWT and SWX, there are no SW bits in a segment + * table entry. + */ + pte_val(pte) &= ~(_PAGE_SWT | _PAGE_SWX); + /* + * Also set the change-override bit because we don't need dirty bit + * tracking for hugetlbfs pages. + */ + pte_val(pte) |= (_SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_CO); + return pte; +} +#endif + #ifdef CONFIG_PGSTE /* * Get (and clear) the user dirty bit for a PTE. |