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. ]
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| @@ -195,9 +195,6 @@ struct task_struct init_task __aligned(L1_CACHE_BYTES) = { · 194 unmodified lines | ||
| 195 | 195 | #endif |
| 196 | 196 | #ifdef CONFIG_TASKS_TRACE_RCU |
| 197 | 197 | .trc_reader_nesting = 0, |
| 198 | − .trc_reader_special.s = 0, | |
| 199 | − .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), | |
| 200 | − .trc_blkd_node = LIST_HEAD_INIT(init_task.trc_blkd_node), | |
| 201 | 198 | #endif |
| 202 | 199 | #ifdef CONFIG_CPUSETS |
| 203 | 200 | .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, |