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    Subject[PATCH 5/7] change_protection for hugetlb
    Date

    Signed-off-by: Adam Litke <agl@us.ibm.com>
    ---

    fs/hugetlbfs/inode.c | 1 +
    mm/mprotect.c | 5 +++--
    2 files changed, 4 insertions(+), 2 deletions(-)

    diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
    index 198efa7..3de5d93 100644
    --- a/fs/hugetlbfs/inode.c
    +++ b/fs/hugetlbfs/inode.c
    @@ -569,6 +569,7 @@ static const struct pagetable_operations_struct hugetlbfs_pagetable_ops = {
    .copy_vma = copy_hugetlb_page_range,
    .pin_pages = follow_hugetlb_page,
    .unmap_page_range = unmap_hugepage_range,
    + .change_protection = hugetlb_change_protection,
    };

    static const struct inode_operations hugetlbfs_dir_inode_operations = {
    diff --git a/mm/mprotect.c b/mm/mprotect.c
    index 3b8f3c0..172e204 100644
    --- a/mm/mprotect.c
    +++ b/mm/mprotect.c
    @@ -201,8 +201,9 @@ success:
    dirty_accountable = 1;
    }

    - if (is_vm_hugetlb_page(vma))
    - hugetlb_change_protection(vma, start, end, vma->vm_page_prot);
    + if (has_pt_op(vma, change_protection))
    + pt_op(vma, change_protection)(vma, start, end,
    + vma->vm_page_prot);
    else
    change_protection(vma, start, end, vma->vm_page_prot, dirty_accountable);
    vm_stat_account(mm, oldflags, vma->vm_file, -nrpages);
    -
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