sched/core: Use the new llist_for_each_entry_safe() primitive

Now that we've added llist_for_each_entry_safe(), use it to simplify
an open coded version of it in sched_ttwu_pending().

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <kernel-team@lge.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1494549584-11730-1-git-send-email-byungchul.park@lge.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index dde5d1e860f0683f061dcae8993a35d4b4dd4537..4a31239956da5305bc557ce8e680637d0643032a 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1731,7 +1731,7 @@ void sched_ttwu_pending(void)
 {
        struct rq *rq = this_rq();
        struct llist_node *llist = llist_del_all(&rq->wake_list);
-       struct task_struct *p;
+       struct task_struct *p, *t;
        struct rq_flags rf;
 
        if (!llist)
@@ -1740,17 +1740,8 @@ void sched_ttwu_pending(void)
        rq_lock_irqsave(rq, &rf);
        update_rq_clock(rq);
 
-       while (llist) {
-               int wake_flags = 0;
-
-               p = llist_entry(llist, struct task_struct, wake_entry);
-               llist = llist_next(llist);
-
-               if (p->sched_remote_wakeup)
-                       wake_flags = WF_MIGRATED;
-
-               ttwu_do_activate(rq, p, wake_flags, &rf);
-       }
+       llist_for_each_entry_safe(p, t, llist, wake_entry)
+               ttwu_do_activate(rq, p, p->sched_remote_wakeup ? WF_MIGRATED : 0, &rf);
 
        rq_unlock_irqrestore(rq, &rf);
 }