linux-kernel - [PATCH v2] sched/core: remove unnecessary initialization in sched

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Date:   Wed, 14 Sep 2016 10:23:02 +0800
From:   Cheng Chao <cs.os.kernel@...il.com>
To:     mingo@...hat.com, peterz@...radead.org
Cc:     linux-kernel@...r.kernel.org, Cheng Chao <cs.os.kernel@...il.com>,
        stable@...r.kernel.org
Subject: [PATCH v2] sched/core: remove unnecessary initialization in sched_init()

init_idle() is called immediately after current->sched_class
= &fair_sched_class, init_idle() sets current->sched_class
= &idle_sched_class.

Signed-off-by: Cheng Chao <cs.os.kernel@...il.com>
Cc: stable@...r.kernel.org
---
 kernel/sched/core.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a0086a5..ed4f4fe 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7557,11 +7557,6 @@ void __init sched_init(void)
 	enter_lazy_tlb(&init_mm, current);
 
 	/*
-	 * During early bootup we pretend to be a normal task:
-	 */
-	current->sched_class = &fair_sched_class;
-
-	/*
 	 * Make us the idle thread. Technically, schedule() should not be
 	 * called from this thread, however somewhere below it might be,
 	 * but because we are the idle thread, we just pick up running again
-- 
2.4.11