trace_workqueue: use list_for_each_entry() instead of list_for_each_entry_safe()

No need to use list_for_each_entry_safe() in iteration without deleting
any node, we can use list_for_each_entry() instead.

[ 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>

1 files changed, 4 insertions, 6 deletions

diff --git a/kernel/trace/trace_workqueue.c b/kernel/trace/trace_workqueue.c
index cfe56d31d85b..128b64b93f14 100644
--- a/kernel/trace/trace_workqueue.c
+++ b/kernel/trace/trace_workqueue.c
@@ -47,12 +47,11 @@ probe_workqueue_insertion(struct task_struct *wq_thread,
                           struct work_struct *work)
 {
         int cpu = cpumask_first(&wq_thread->cpus_allowed);
-        struct cpu_workqueue_stats *node, *next;
+        struct cpu_workqueue_stats *node;
         unsigned long flags;
 
         spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
-        list_for_each_entry_safe(node, next, &workqueue_cpu_stat(cpu)->list,
-                                                        list) {
+        list_for_each_entry(node, &workqueue_cpu_stat(cpu)->list, list) {
                 if (node->pid == wq_thread->pid) {
                         atomic_inc(&node->inserted);
                         goto found;
@@ -69,12 +68,11 @@ probe_workqueue_execution(struct task_struct *wq_thread,
                           struct work_struct *work)
 {
         int cpu = cpumask_first(&wq_thread->cpus_allowed);
-        struct cpu_workqueue_stats *node, *next;
+        struct cpu_workqueue_stats *node;
         unsigned long flags;
 
         spin_lock_irqsave(&workqueue_cpu_stat(cpu)->lock, flags);
-        list_for_each_entry_safe(node, next, &workqueue_cpu_stat(cpu)->list,
-                                                        list) {
+        list_for_each_entry(node, &workqueue_cpu_stat(cpu)->list, list) {
                 if (node->pid == wq_thread->pid) {
                         node->executed++;
                         goto found;