diff options
| author | Punit Agrawal <punit.agrawal@arm.com> | 2017-05-31 09:17:18 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-05-31 09:17:18 +1000 |
| commit | 8516ed73a70ade89b47aa6be9bce8cfdf89807ea (patch) | |
| tree | 18ad60f8360f4a9bfd99401576b8e19d76f6632c /mm | |
| parent | 74c9793944c2050f064110af0d268ff2cb540204 (diff) | |
mm/hugetlb: allow architectures to override huge_pte_clear()
When unmapping a hugepage range, huge_pte_clear() is used to clear the
page table entries that are marked as not present. huge_pte_clear()
internally just ends up calling pte_clear() which does not correctly deal
with hugepages consisting of contiguous page table entries.
Add a size argument to address this issue and allow architectures to
override huge_pte_clear() by wrapping it in a #ifndef block.
Update s390 implementation with the size parameter as well.
Note that the change only affects huge_pte_clear() - the other generic
hugetlb functions don't need any change.
Link: http://lkml.kernel.org/r/20170522162555.4313-1-punit.agrawal@arm.com
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390 bits]
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Steve Capper <steve.capper@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 075345532396..3dbe3e257975 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3351,7 +3351,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, * unmapped and its refcount is dropped, so just clear pte here. */ if (unlikely(!pte_present(pte))) { - huge_pte_clear(mm, address, ptep); + huge_pte_clear(mm, address, ptep, sz); spin_unlock(ptl); continue; } |