Btrfs: Use async helpers to deal with pages that have been improperly dirtied

Higher layers sometimes call set_page_dirty without asking the filesystem
to help.  This causes many problems for the data=ordered and cow code.
This commit detects pages that haven't been properly setup for IO and
kicks off an async helper to deal with them.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 12e765f7e0d4..20928639d173 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -313,6 +313,7 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
                 for (i = 0; i < num_pages; i++) {
                         struct page *p = pages[i];
                         SetPageUptodate(p);
+                        ClearPageChecked(p);
                         set_page_dirty(p);
                 }
         } else {