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    Subject[PATCH tip/core/rcu 08/12] rcutorture: Move to dynamic initialization of rcu_fwds
    Date
    From: "Paul E. McKenney" <paulmck@kernel.org>

    In order to add multiple call_rcu() forward-progress kthreads, it will
    be necessary to dynamically allocate and initialize. This commit
    therefore moves the initialization from compile time to instead
    immediately precede thread-creation time.

    Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
    ---
    kernel/rcu/rcutorture.c | 8 +++-----
    1 file changed, 3 insertions(+), 5 deletions(-)

    diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
    index cc88ce9..6f540fe 100644
    --- a/kernel/rcu/rcutorture.c
    +++ b/kernel/rcu/rcutorture.c
    @@ -1686,11 +1686,7 @@ struct rcu_fwd {
    unsigned long rcu_launder_gp_seq_start;
    };

    -struct rcu_fwd rcu_fwds = {
    - .rcu_fwd_lock = __SPIN_LOCK_UNLOCKED(rcu_fwds.rcu_fwd_lock),
    - .rcu_fwd_cb_tail = &rcu_fwds.rcu_fwd_cb_head,
    -};
    -
    +struct rcu_fwd rcu_fwds;
    bool rcu_fwd_emergency_stop;

    static void rcu_torture_fwd_cb_hist(struct rcu_fwd *rfp)
    @@ -2026,6 +2022,8 @@ static int __init rcu_torture_fwd_prog_init(void)
    WARN_ON(1); /* Make sure rcutorture notices conflict. */
    return 0;
    }
    + spin_lock_init(&rcu_fwds.rcu_fwd_lock);
    + rcu_fwds.rcu_fwd_cb_tail = &rcu_fwds.rcu_fwd_cb_head;
    if (fwd_progress_holdoff <= 0)
    fwd_progress_holdoff = 1;
    if (fwd_progress_div <= 0)
    --
    2.9.5
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