From: Paul E. McKenney <paulmck@kernel.org>
Date: Mon, 29 Dec 2025 19:10:59 +0000 (-0800)
Subject: rcu: Move rcu_tasks_trace_srcu_struct out of #ifdef CONFIG_TASKS_RCU_GENERIC
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=176a6aeaf1eb97b8ddf88e324fd1cbf47d52ba28;p=thirdparty%2Flinux.git

rcu: Move rcu_tasks_trace_srcu_struct out of #ifdef CONFIG_TASKS_RCU_GENERIC

Moving the rcu_tasks_trace_srcu_struct structure instance out
from under the CONFIG_TASKS_RCU_GENERIC Kconfig option permits
the CONFIG_TASKS_TRACE_RCU Kconfig option to stop enabling this
CONFIG_TASKS_RCU_GENERIC Kconfig option.  This commit also therefore
makes it so.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: bpf@vger.kernel.org
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
---

diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
index 8d5a1ecb7d56c..c381a31301168 100644
--- a/kernel/rcu/Kconfig
+++ b/kernel/rcu/Kconfig
@@ -82,7 +82,7 @@ config NEED_SRCU_NMI_SAFE
 	def_bool HAVE_NMI && !ARCH_HAS_NMI_SAFE_THIS_CPU_OPS && !TINY_SRCU
 
 config TASKS_RCU_GENERIC
-	def_bool TASKS_RCU || TASKS_RUDE_RCU || TASKS_TRACE_RCU
+	def_bool TASKS_RCU || TASKS_RUDE_RCU
 	help
 	  This option enables generic infrastructure code supporting
 	  task-based RCU implementations.  Not for manual selection.
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 1249b47f0a8da..76f952196a292 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -1439,35 +1439,6 @@ EXPORT_SYMBOL_GPL(rcu_tasks_rude_get_gp_data);
 
 #endif /* #ifdef CONFIG_TASKS_RUDE_RCU */
 
-////////////////////////////////////////////////////////////////////////
-//
-// Tracing variant of Tasks RCU.  This variant is designed to be used
-// to protect tracing hooks, including those of BPF.  This variant
-// is implemented via a straightforward mapping onto SRCU-fast.
-
-#ifdef CONFIG_TASKS_TRACE_RCU
-
-DEFINE_SRCU_FAST(rcu_tasks_trace_srcu_struct);
-EXPORT_SYMBOL_GPL(rcu_tasks_trace_srcu_struct);
-
-// Placeholder to suppress build errors through transition period.
-void __init rcu_tasks_trace_suppress_unused(void)
-{
-#ifndef CONFIG_TINY_RCU
-	show_rcu_tasks_generic_gp_kthread(NULL, NULL);
-#endif // #ifndef CONFIG_TINY_RCU
-	rcu_spawn_tasks_kthread_generic(NULL);
-	synchronize_rcu_tasks_generic(NULL);
-	call_rcu_tasks_generic(NULL, NULL, NULL);
-	call_rcu_tasks_iw_wakeup(NULL);
-	cblist_init_generic(NULL);
-#ifndef CONFIG_TINY_RCU
-	rcu_tasks_torture_stats_print_generic(NULL, NULL, NULL, NULL);
-#endif // #ifndef CONFIG_TINY_RCU
-}
-
-#endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */
-
 #ifndef CONFIG_TINY_RCU
 void show_rcu_tasks_gp_kthreads(void)
 {
@@ -1621,3 +1592,16 @@ core_initcall(rcu_init_tasks_generic);
 #else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
 static inline void rcu_tasks_bootup_oddness(void) {}
 #endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */
+
+#ifdef CONFIG_TASKS_TRACE_RCU
+
+////////////////////////////////////////////////////////////////////////
+//
+// Tracing variant of Tasks RCU.  This variant is designed to be used
+// to protect tracing hooks, including those of BPF.  This variant
+// is implemented via a straightforward mapping onto SRCU-fast.
+
+DEFINE_SRCU_FAST(rcu_tasks_trace_srcu_struct);
+EXPORT_SYMBOL_GPL(rcu_tasks_trace_srcu_struct);
+
+#endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */