From 1b4e9fdf9ed489c779259734e0b47f408c7786f2 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Thu, 22 Feb 2024 10:09:19 -0800 Subject: [PATCH] rcu: Create NEED_TASKS_RCU to factor out enablement logic Currently, if a Kconfig option depends on TASKS_RCU, it conditionally does "select TASKS_RCU if PREEMPTION". This works, but requires any change in this enablement logic to be replicated across all such "select" clauses. This commit therefore creates a new NEED_TASKS_RCU Kconfig option so that the default value of TASKS_RCU can depend on a combination of this new option and any needed enablement logic, so that this logic is in one place. While in the area, also anticipate a likely future change by adding PREEMPT_AUTO to that logic. Signed-off-by: Paul E. McKenney Cc: Ankur Arora Cc: Thomas Gleixner Cc: Steven Rostedt Acked-by: Mark Rutland Signed-off-by: Uladzislau Rezki (Sony) --- kernel/rcu/Kconfig | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 7dca0138260c..3e079de0f5b4 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -85,9 +85,13 @@ config FORCE_TASKS_RCU idle, and user-mode execution as quiescent states. Not for manual selection in most cases. -config TASKS_RCU +config NEED_TASKS_RCU bool default n + +config TASKS_RCU + bool + default NEED_TASKS_RCU && (PREEMPTION || PREEMPT_AUTO) select IRQ_WORK config FORCE_TASKS_RUDE_RCU