linux-kernel - [PATCH] sched/cputime: remove irqtime_account_idle

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Date:   Thu, 16 Jan 2020 11:17:30 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sched/cputime: remove irqtime_account_idle_ticks

irqtime_account_idle_ticks just add longer call path w/o enough meaning.
We don't bother remove this function to simply code and reduce a
bit object size of kernel.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Ingo Molnar <mingo@...hat.com> 
Cc: Peter Zijlstra <peterz@...radead.org> 
Cc: Juri Lelli <juri.lelli@...hat.com> 
Cc: Vincent Guittot <vincent.guittot@...aro.org> 
Cc: Dietmar Eggemann <dietmar.eggemann@....com> 
Cc: Steven Rostedt <rostedt@...dmis.org> 
Cc: Ben Segall <bsegall@...gle.com> 
Cc: Mel Gorman <mgorman@...e.de> 
Cc: linux-kernel@...r.kernel.org 
---
 kernel/sched/cputime.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index cff3e656566d..17640d145e44 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -390,12 +390,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
 	}
 }
 
-static void irqtime_account_idle_ticks(int ticks)
-{
-	irqtime_account_process_tick(current, 0, ticks);
-}
 #else /* CONFIG_IRQ_TIME_ACCOUNTING */
-static inline void irqtime_account_idle_ticks(int ticks) { }
 static inline void irqtime_account_process_tick(struct task_struct *p, int user_tick,
 						int nr_ticks) { }
 #endif /* CONFIG_IRQ_TIME_ACCOUNTING */
@@ -505,7 +500,7 @@ void account_idle_ticks(unsigned long ticks)
 	u64 cputime, steal;
 
 	if (sched_clock_irqtime) {
-		irqtime_account_idle_ticks(ticks);
+		irqtime_account_process_tick(current, 0, ticks);
 		return;
 	}
 
-- 
1.8.3.1