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-rw-r--r--fs/hugetlbfs/inode.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 113eba3..a14328d 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -31,6 +31,7 @@
#include <linux/statfs.h>
#include <linux/security.h>
#include <linux/magic.h>
+#include <linux/migrate.h>
#include <asm/uaccess.h>
@@ -573,6 +574,19 @@ static int hugetlbfs_set_page_dirty(struct page *page)
return 0;
}
+static int hugetlbfs_migrate_page(struct address_space *mapping,
+ struct page *newpage, struct page *page)
+{
+ int rc;
+
+ rc = migrate_huge_page_move_mapping(mapping, newpage, page);
+ if (rc)
+ return rc;
+ migrate_page_copy(newpage, page);
+
+ return 0;
+}
+
static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb);
@@ -659,6 +673,7 @@ static const struct address_space_operations hugetlbfs_aops = {
.write_begin = hugetlbfs_write_begin,
.write_end = hugetlbfs_write_end,
.set_page_dirty = hugetlbfs_set_page_dirty,
+ .migratepage = hugetlbfs_migrate_page,
};