linux-kernel - [PATCH] sched/deadline: No need to check NULL later

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Message-Id: <1459509198-26543-1-git-send-email-xlpang@redhat.com>
Date:	Fri,  1 Apr 2016 19:13:18 +0800
From:	Xunlei Pang <xlpang@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@....com>,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Xunlei Pang <xlpang@...hat.com>
Subject: [PATCH] sched/deadline: No need to check NULL later_mask

Unlike rt tasks, we (should) have no deadline tasks in
booting phase before the mask is allocated, so we can
safely remove the check.

Signed-off-by: Xunlei Pang <xlpang@...hat.com>
---
 kernel/sched/deadline.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index fb98160..7b8aa93 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1295,10 +1295,6 @@ static int find_later_rq(struct task_struct *task)
 	int this_cpu = smp_processor_id();
 	int best_cpu, cpu = task_cpu(task);
 
-	/* Make sure the mask is initialized first */
-	if (unlikely(!later_mask))
-		return -1;
-
 	if (task->nr_cpus_allowed == 1)
 		return -1;
 
-- 
1.8.3.1