[PATCH v4 3/4] ocfs2: use jbd2 jinode dirty range accessor

[Li Chen <me@linux.beauty>]

ocfs2 journal commit callback reads jbd2_inode dirty range fields without
holding journal->j_list_lock.
Use jbd2_jinode_get_dirty_range() to get the range in bytes.

Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Li Chen <me@linux.beauty>
---
Changes since v3:
- Add Reviewed-by: Jan Kara.

Changes since v2:
- Use jbd2_jinode_get_dirty_range() instead of direct i_dirty_* reads.
- Drop per-caller page->byte conversion (now handled by the accessor).

 fs/ocfs2/journal.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 85239807dec78..68c2f567e6e1b 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -902,8 +902,13 @@ int ocfs2_journal_alloc(struct ocfs2_super *osb)
 
 static int ocfs2_journal_submit_inode_data_buffers(struct jbd2_inode *jinode)
 {
-	return filemap_fdatawrite_range(jinode->i_vfs_inode->i_mapping,
-			jinode->i_dirty_start, jinode->i_dirty_end);
+	struct address_space *mapping = jinode->i_vfs_inode->i_mapping;
+	loff_t range_start, range_end;
+
+	if (!jbd2_jinode_get_dirty_range(jinode, &range_start, &range_end))
+		return 0;
+
+	return filemap_fdatawrite_range(mapping, range_start, range_end);
 }
 
 int ocfs2_journal_init(struct ocfs2_super *osb, int *dirty)
-- 
2.53.0