Btrfs: factor page private preparations into a helper

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 698eaea612f1..4cc459c943ec 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -543,12 +543,7 @@ static int prepare_pages(struct btrfs_root *root,
                 }
                 cancel_dirty_page(pages[i], PAGE_CACHE_SIZE);
                 wait_on_page_writeback(pages[i]);
-                if (!PagePrivate(pages[i])) {
-                        SetPagePrivate(pages[i]);
-                        set_page_private(pages[i], 1);
-                        WARN_ON(!pages[i]->mapping->a_ops->invalidatepage);
-                        page_cache_get(pages[i]);
-                }
+                set_page_extent_mapped(pages[i]);
                 WARN_ON(!PageLocked(pages[i]));
         }
         return 0;