diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2017-06-28 11:32:34 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-07-02 20:40:28 +1000 |
| commit | ebd31197931d75c837269f3fd3365b4cee358faf (patch) | |
| tree | 53525796d793b5cc488c21d5d1fca5cb739623eb /arch/powerpc/mm/pgtable_64.c | |
| parent | b584c2544041707ea041748dbfbb1081289c6cf5 (diff) | |
powerpc/mm: Add devmap support for ppc64
Add support for the devmap bit on PTEs and PMDs for PPC64 Book3S. This
is used to differentiate device backed memory from transparent huge
pages since they are handled in more or less the same manner by the core
mm code.
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/pgtable_64.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 1feb36e58a45..bce0ed50789c 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -324,7 +324,7 @@ struct page *pud_page(pud_t pud) */ struct page *pmd_page(pmd_t pmd) { - if (pmd_trans_huge(pmd) || pmd_huge(pmd)) + if (pmd_trans_huge(pmd) || pmd_huge(pmd) || pmd_devmap(pmd)) return pte_page(pmd_pte(pmd)); return virt_to_page(pmd_page_vaddr(pmd)); } |