btrfs_buffer_uptodate
if (btrfs_buffer_uptodate(tmp, check.transid, true) > 0) {
if (unlikely(!btrfs_buffer_uptodate(root->node, generation, false))) {
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, bool atomic);
if (btrfs_buffer_uptodate(next, generation, false))
if (btrfs_buffer_uptodate(eb, gen, true)) {
if (btrfs_buffer_uptodate(eb, gen, false) && level == 0) {