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| author | Mike Kravetz <mike.kravetz@oracle.com> | 2017-02-22 15:42:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 16:41:28 -0800 |
| commit | 8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4 (patch) | |
| tree | a3f1d6827a9a66d30172a9ba4f9e5f5f521f2156 /include/linux/hugetlb.h | |
| parent | fa4d75c1de13299c61b5e18a1ae46bc00888b599 (diff) | |
| download | linux-8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4.tar.gz linux-8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4.tar.bz2 linux-8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4.zip | |
userfaultfd: hugetlbfs: add hugetlb_mcopy_atomic_pte for userfaultfd support
hugetlb_mcopy_atomic_pte is the low level routine that implements the
userfaultfd UFFDIO_COPY command. It is based on the existing
mcopy_atomic_pte routine with modifications for huge pages.
Link: http://lkml.kernel.org/r/20161216144821.5183-18-aarcange@redhat.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 48c76d612d40..aab2fff3e269 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -81,6 +81,11 @@ void hugetlb_show_meminfo(void); unsigned long hugetlb_total_pages(void); int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, unsigned int flags); +int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, + struct vm_area_struct *dst_vma, + unsigned long dst_addr, + unsigned long src_addr, + struct page **pagep); int hugetlb_reserve_pages(struct inode *inode, long from, long to, struct vm_area_struct *vma, vm_flags_t vm_flags); @@ -149,6 +154,8 @@ static inline void hugetlb_show_meminfo(void) #define is_hugepage_only_range(mm, addr, len) 0 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) #define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; }) +#define hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \ + src_addr, pagep) ({ BUG(); 0; }) #define huge_pte_offset(mm, address) 0 static inline int dequeue_hwpoisoned_huge_page(struct page *page) { |