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rcu: Move rcu_tasks_trace_srcu_struct out of #ifdef CONFIG_TASKS_RCU_GENERIC

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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>
This commit is contained in:
Paul E. McKenney 2025-12-29 11:10:59 -08:00 committed by Boqun Feng
parent a73fc3dcc6
commit 176a6aeaf1
2 changed files with 14 additions and 30 deletions
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2
kernel/rcu/Kconfig
View File

@ -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.

42
kernel/rcu/tasks.h
View File

@ -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 */