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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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