The details of this are subtle and was discussed recently. Add a quick-quiz about this and refer to it from the code, for more clarity. Reviewed-by: "Paul E. McKenney" <paulmck@kernel.org> Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org>