From a73fc3dcc60b6d7a2075e2fbdca64fd53600f855 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Mon, 29 Dec 2025 11:10:58 -0800 Subject: rcu: Clean up after the SRCU-fastification of RCU Tasks Trace Now that RCU Tasks Trace has been re-implemented in terms of SRCU-fast, the ->trc_ipi_to_cpu, ->trc_blkd_cpu, ->trc_blkd_node, ->trc_holdout_list, and ->trc_reader_special task_struct fields are no longer used. In addition, the rcu_tasks_trace_qs(), rcu_tasks_trace_qs_blkd(), exit_tasks_rcu_finish_trace(), and rcu_spawn_tasks_trace_kthread(), show_rcu_tasks_trace_gp_kthread(), rcu_tasks_trace_get_gp_data(), rcu_tasks_trace_torture_stats_print(), and get_rcu_tasks_trace_gp_kthread() functions and all the other functions that they invoke are no longer used. Also, the TRC_NEED_QS and TRC_NEED_QS_CHECKED CPP macros are no longer used. Neither are the rcu_tasks_trace_lazy_ms and rcu_task_ipi_delay rcupdate module parameters and the TASKS_TRACE_RCU_READ_MB Kconfig option. This commit therefore removes all of them. [ paulmck: Apply Alexei Starovoitov feedback. ] Signed-off-by: Paul E. McKenney Cc: Andrii Nakryiko Cc: Alexei Starovoitov Cc: Peter Zijlstra Cc: bpf@vger.kernel.org Reviewed-by: Joel Fernandes Signed-off-by: Boqun Feng --- init/init_task.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'init') diff --git a/init/init_task.c b/init/init_task.c index 49b13d7c3985..db92c404d59a 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -195,9 +195,6 @@ struct task_struct init_task __aligned(L1_CACHE_BYTES) = { #endif #ifdef CONFIG_TASKS_TRACE_RCU .trc_reader_nesting = 0, - .trc_reader_special.s = 0, - .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), - .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), #endif #ifdef CONFIG_CPUSETS .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, -- cgit v1.2.3