Re: [PATCH 3/7] rcu: fix header guard for rcu_all_qs()

[Paul E. McKenney]

On Thu, Oct 10, 2024 at 10:11:29AM +0200, Peter Zijlstra wrote:
> On Thu, Oct 10, 2024 at 08:41:23AM +0200, Sebastian Andrzej Siewior wrote:
> > On 2024-10-09 09:54:07 [-0700], Ankur Arora wrote:
> > > rcu_all_qs() is defined for !CONFIG_PREEMPT_RCU but the declaration
> > > is conditioned on CONFIG_PREEMPTION.
> > > 
> > > With CONFIG_PREEMPT_LAZY, CONFIG_PREEMPTION=y does not imply
> > > CONFIG_PREEMPT_RCU=y.
> > 
> > From kernel/rcu/Kconfig:
> > | config PREEMPT_RCU
> > |         bool
> > |         default y if PREEMPTION
> > 
> > this looks like PREEMPT_RCU implies PREEMPTION.
> 
> The point was to make PREEMPT_RCU=n possible even when PREEMPTION=y,
> which is fine.

Agreed!

							Thanx, Paul