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    Subject[PATCH 2/4] trace_workqueue: Remove cpu_workqueue_stats->first_entry
    cpu_workqueue_stats->first_entry is useless because we can judge header of cpu
    workqueue by:
    if (&cpu_workqueue_stats->list == workqueue_cpu_stat(cpu)->list.next)

    Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
    ---
    kernel/trace/trace_workqueue.c | 4 ----
    1 files changed, 0 insertions(+), 4 deletions(-)

    diff --git a/kernel/trace/trace_workqueue.c b/kernel/trace/trace_workqueue.c
    index 934b27c..f52db53 100644
    --- a/kernel/trace/trace_workqueue.c
    +++ b/kernel/trace/trace_workqueue.c
    @@ -16,8 +16,6 @@
    /* A cpu workqueue thread */
    struct cpu_workqueue_stats {
    struct list_head list;
    -/* Useful to know if we print the cpu headers */
    - bool first_entry;
    int cpu;
    pid_t pid;
    /* Can be inserted from interrupt or user context, need to be atomic */
    @@ -103,8 +101,6 @@ static void probe_workqueue_creation(struct task_struct *wq_thread, int cpu)
    cws->pid = wq_thread->pid;

    spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
    - if (list_empty(&workqueue_cpu_stat(cpu)->list))
    - cws->first_entry = true;
    list_add_tail(&cws->list, &workqueue_cpu_stat(cpu)->list);
    spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
    }
    --
    1.5.5.3



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