srcu: Add size-state transitioning code

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This is just dead code at the moment, and will be used once
the state-transition code is activated.

Because srcu_barrier() must be aware of transition before call_srcu(), the
state machine waits for an SRCU grace period before callbacks are queued
to the non-CPU-0 queues.  This requres that portions of srcu_barrier()
be enclosed in an SRCU read-side critical section.

Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Paul E. McKenney 2022-01-24 15:41:32 -08:00

parent 2ec303113d

commit e2f638365d

1 changed files with 13 additions and 0 deletions

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kernel/rcu/srcutree.c

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