Commit e5846fc6 authored by Chris Mason's avatar Chris Mason

Btrfs: Add properly locking around add_root_to_dirty_list

add_root_to_dirty_list happens once at the very beginning of the
transaction, but it is still racey.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent dc7fdde3
......@@ -220,10 +220,12 @@ struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root)
*/
static void add_root_to_dirty_list(struct btrfs_root *root)
{
spin_lock(&root->fs_info->trans_lock);
if (root->track_dirty && list_empty(&root->dirty_list)) {
list_add(&root->dirty_list,
&root->fs_info->dirty_cowonly_roots);
}
spin_unlock(&root->fs_info->trans_lock);
}
/*
......
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