rcu: Remove rcu_data.exp_deferred_qs and convert to rcu_data.cpu no_qs.b.exp

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Having two fields for the same purpose with subtle differences on
different RCU flavours is confusing, especially when both fields always
exist on both RCU flavours.

Fortunately, it is now safe for preemptible RCU to rely on the rcu_data
structure's ->cpu_no_qs.b.exp field, just like non-preemptible RCU.
This commit therefore removes the ad-hoc ->exp_deferred_qs field.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Frederic Weisbecker 2021-09-16 14:10:48 +02:00 • committed by Paul E. McKenney

parent 6e16b0f7ba

commit 6120b72e25

3 changed files with 8 additions and 10 deletions

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1

kernel/rcu/tree.h

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5

kernel/rcu/tree_exp.h

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12

kernel/rcu/tree_plugin.h

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