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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-02-14 15:33:55 -0800 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-04-15 11:29:47 +0200 |
| commit | c1ec7c158090ab968ab9022a9f67e7d88d66ee61 (patch) | |
| tree | 89a2c0c899b7107ec62891ef4a87c7ebd887820f | |
| parent | 058e87782c91696020bdb0aa28ddf77d89aed266 (diff) | |
rcu: Make TINY_RCU depend on !PREEMPT_RCU rather than !PREEMPTION
Right now, TINY_RCU depends on (!PREEMPTION && !SMP), which has served the
kernel well for many years due to the fact that PREEMPT_RCU is normally
a synonym for PREEMPTION. But with the advent of lazy preemption,
it will be possible to have non-preemptible RCU in a preemptible kernel,
so that kernels could be built with PREEMPT_RCU=n and PREEMPTION=y.
This commit therefore makes TINY_RCU depend on (!PREEMPT_RCU && !SMP),
thus allowing for a non-preemptible RCU in preemptible kernels.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Ankur Arora <ankur.a.arora@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
| -rw-r--r-- | kernel/rcu/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index e7d2dd267593..7dca0138260c 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -31,7 +31,7 @@ config PREEMPT_RCU config TINY_RCU bool - default y if !PREEMPTION && !SMP + default y if !PREEMPT_RCU && !SMP help This option selects the RCU implementation that is designed for UP systems from which real-time response |