Hi all, After merging the rcu tree, today's linux-next build (x86_64 allmodconfig) failed like this: kernel/rcu/rcuscale.c:340:27: error: 'get_rcu_tasks_trace_gp_kthread' undeclared here (not in a function); did you mean 'show_rcu_tasks_trace_gp_kthread'? 340 | .rso_gp_kthread = get_rcu_tasks_trace_gp_kthread, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | show_rcu_tasks_trace_gp_kthread Caused by commit 9bb839a83e1b ("rcuscale: Measure grace-period kthread CPU time") CONFIG_RCU_SCALE_TEST=m I have used the rcu tree from next-20230518 for today. -- Cheers, Stephen Rothwell