FYI, we noticed a +618 bytes kernel size regression due to commit:

commit: 0a2707446991f80336b8d89c942e498973d4793e (rcu/tiny: support reclaim for head-less object)
url: https://github.com/0day-ci/linux/commits/Uladzislau-Rezki-Sony/Introduce-kvfree_rcu-1-or-2-arguments/20200429-061752

Details as below (size data is obtained by `nm --size-sort vmlinux`):

02dabf68: rcu/tiny: move kvfree_call_rcu() out of header
0a270744: rcu/tiny: support reclaim for head-less object

+----------------------------+----------+----------+-------+
|           symbol           | 02dabf68 | 0a270744 | delta |
+----------------------------+----------+----------+-------+
| bzImage                    | 439392   | 439680   | 288   |
| nm.T.kvfree_call_rcu       | 5        | 209      | 204   |
| nm.T.rcu_init              | 25       | 157      | 132   |
| nm.t.kvfree_rcu_monitor    | 0        | 96       | 96    |
| nm.t.kvfree_rcu_work       | 0        | 81       | 81    |
| nm.b.monitor_work          | 0        | 44       | 44    |
| nm.b.rcu_work              | 0        | 28       | 28    |
| nm.t.rcu_process_callbacks | 146      | 153      | 7     |
| nm.T.call_rcu              | 46       | 51       | 5     |
| nm.b.kvcache               | 0        | 4        | 4     |
| nm.b.kvhead                | 0        | 4        | 4     |
| nm.b.kvhead_free           | 0        | 4        | 4     |
| nm.b.rcu_init_done         | 0        | 4        | 4     |
| nm.T.rcu_qs                | 36       | 40       | 4     |
| nm.b.monitor_todo          | 0        | 1        | 1     |
+----------------------------+----------+----------+-------+



Thanks,
Kbuild test robot