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trace_workqueue: remove cpu_workqueue_stats->first_entry

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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 <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Tom Zanussi <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
This commit is contained in:
Zhaolei 2009-04-20 14:59:36 +08:00 • committed by Frederic Weisbecker
commit b8867164f0
1 changed files with 0 additions and 4 deletions
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4
kernel/trace/trace_workqueue.c
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@ -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);
}