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-book3s64.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-book3s64.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable-book3s64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/mm/pgtable-book3s64.c b/arch/powerpc/mm/pgtable-book3s64.c index 5fcb3dd74c13..31eed8fa8e99 100644 --- a/arch/powerpc/mm/pgtable-book3s64.c +++ b/arch/powerpc/mm/pgtable-book3s64.c @@ -32,7 +32,7 @@ int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address, { int changed; #ifdef CONFIG_DEBUG_VM - WARN_ON(!pmd_trans_huge(*pmdp)); + WARN_ON(!pmd_trans_huge(*pmdp) && !pmd_devmap(*pmdp)); assert_spin_locked(&vma->vm_mm->page_table_lock); #endif changed = !pmd_same(*(pmdp), entry); @@ -59,7 +59,7 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr, #ifdef CONFIG_DEBUG_VM WARN_ON(pte_present(pmd_pte(*pmdp)) && !pte_protnone(pmd_pte(*pmdp))); assert_spin_locked(&mm->page_table_lock); - WARN_ON(!pmd_trans_huge(pmd)); + WARN_ON(!(pmd_trans_huge(pmd) || pmd_devmap(pmd))); #endif trace_hugepage_set_pmd(addr, pmd_val(pmd)); return set_pte_at(mm, addr, pmdp_ptep(pmdp), pmd_pte(pmd)); |