trace_workqueue: remove cpu_workqueue_stats->first_entry
cpu_workqueue_stats->first_entry is useless because we can retrieve the header of a cpu workqueue using: if (&cpu_workqueue_stats->list == workqueue_cpu_stat(cpu)->list.next) [ Impact: cleanup ] Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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@ -16,8 +16,6 @@
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/* A cpu workqueue thread */
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struct cpu_workqueue_stats {
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struct list_head list;
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/* Useful to know if we print the cpu headers */
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bool first_entry;
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int cpu;
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pid_t pid;
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/* Can be inserted from interrupt or user context, need to be atomic */
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@ -103,8 +101,6 @@ static void probe_workqueue_creation(struct task_struct *wq_thread, int cpu)
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cws->pid = wq_thread->pid;
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spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
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if (list_empty(&workqueue_cpu_stat(cpu)->list))
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cws->first_entry = true;
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list_add_tail(&cws->list, &workqueue_cpu_stat(cpu)->list);
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spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
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}
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