trace_workqueues: fix empty line's output

Empty lines separate cpus stat. After previous
fix(trace_stat: keep original order) applied, the empty lines
are displayed at incorrect position.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Steven Rostedt <srostedt@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <49C9F266.2060706@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 6 deletions

diff --git a/kernel/trace/trace_workqueue.c b/kernel/trace/trace_workqueue.c
index 9ab035b58cf1..797201e4a137 100644
--- a/kernel/trace/trace_workqueue.c
+++ b/kernel/trace/trace_workqueue.c
@@ -196,6 +196,11 @@ static int workqueue_stat_show(struct seq_file *s, void *p)
         struct pid *pid;
         struct task_struct *tsk;
 
+        spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
+        if (&cws->list == workqueue_cpu_stat(cpu)->list.next)
+                seq_printf(s, "\n");
+        spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
+
         pid = find_get_pid(cws->pid);
         if (pid) {
                 tsk = get_pid_task(pid, PIDTYPE_PID);
@@ -208,18 +213,13 @@ static int workqueue_stat_show(struct seq_file *s, void *p)
                 put_pid(pid);
         }
 
-        spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
-        if (&cws->list == workqueue_cpu_stat(cpu)->list.next)
-                seq_printf(s, "\n");
-        spin_unlock_irqrestore(&workqueue_cpu_stat(cpu)->lock, flags);
-
         return 0;
 }
 
 static int workqueue_stat_headers(struct seq_file *s)
 {
         seq_printf(s, "# CPU  INSERTED  EXECUTED   NAME\n");
-        seq_printf(s, "# |      |         |          |\n\n");
+        seq_printf(s, "# |      |         |          |\n");
         return 0;
 }