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02bae7a242
This commit adds support for smp_mb__after_srcu_read_unlock(), which, when combined with a prior srcu_read_unlock(), implies a full memory barrier. No ordering is guaranteed to accesses between the two, and placing accesses between is bad practice in any case. Tests may be found at https://github.com/paulmckrcu/litmus in files matching manual/kernel/C-srcu-mb-*.litmus. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>