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    Subject[RFC PATCH v1 26/70] rcu, tree: _FROZEN Cleanup
    Date
    Remove XXX_FROZEN state from rcu/tree.

    Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
    ---
    kernel/rcu/tree.c | 12 +++++-------
    1 file changed, 5 insertions(+), 7 deletions(-)

    diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
    index 625d0b0..8518338 100644
    --- a/kernel/rcu/tree.c
    +++ b/kernel/rcu/tree.c
    @@ -3440,28 +3440,26 @@ static int rcu_cpu_notify(struct notifier_block *self,
    struct rcu_state *rsp;

    trace_rcu_utilization(TPS("Start CPU hotplug"));
    - switch (action) {
    + switch (action & ~CPU_TASKS_FROZEN) {
    case CPU_UP_PREPARE:
    - case CPU_UP_PREPARE_FROZEN:
    rcu_prepare_cpu(cpu);
    rcu_prepare_kthreads(cpu);
    break;
    case CPU_ONLINE:
    case CPU_DOWN_FAILED:
    - rcu_boost_kthread_setaffinity(rnp, -1);
    + if (!(action & CPU_TASKS_FROZEN))
    + rcu_boost_kthread_setaffinity(rnp, -1);
    break;
    case CPU_DOWN_PREPARE:
    - rcu_boost_kthread_setaffinity(rnp, cpu);
    + if (!(action & CPU_TASKS_FROZEN))
    + rcu_boost_kthread_setaffinity(rnp, cpu);
    break;
    case CPU_DYING:
    - case CPU_DYING_FROZEN:
    for_each_rcu_flavor(rsp)
    rcu_cleanup_dying_cpu(rsp);
    break;
    case CPU_DEAD:
    - case CPU_DEAD_FROZEN:
    case CPU_UP_CANCELED:
    - case CPU_UP_CANCELED_FROZEN:
    for_each_rcu_flavor(rsp)
    rcu_cleanup_dead_cpu(cpu, rsp);
    break;
    --
    2.0.0.rc2


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