srcu: Explain why callbacks invocations can't run concurrently

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If an SRCU barrier is queued while callbacks are running and a new
callbacks invocator for the same sdp were to run concurrently, the
RCU barrier might execute too early. As this requirement is non-obvious,
make sure to keep a record.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.iitr10@gmail.com>

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Frederic Weisbecker 2023-10-04 01:29:03 +02:00 • committed by Neeraj Upadhyay (AMD)

parent 94c55b9e21

commit c21357e446

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kernel/rcu/srcutree.c

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