rcutorture: Make {,s}rcu_read_delay() better handle forward-progress testing

The rcu_read_delay() and srcu_read_delay() functions are suppose to
avoid (or at least to minimize) read-side delays during call_rcu()-based
forward-progress testing.  Although rcu_read_delay() does account for
this by testing rcu_fwd_cb_nodelay, it only does so in some cases, and
srcu_read_delay() does not bother at all.  And rcutorture testing does
occasionally turn up the MIN_FWD_CBS_LAUNDERED failure when running
forward-progress tests on Tree SRCU flavors.

This commit therefore makes both rcu_read_delay() and srcu_read_delay()
take an immediate exit if rcu_fwd_cb_nodelay is set.

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

0 files changed, 0 insertions, 0 deletions