linux-kernel - [PATCH] time: tick-sched: use bool for tick

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Message-ID: <ab6167c5ea5be81f0482a7da54d781a4@codeaurora.org>
Date:   Tue, 10 Apr 2018 16:51:37 +0800
From:   yuankuiz@...eaurora.org
To:     linux-pm@...r.kernel.org
Cc:     rjw@...ysocki.net, fweisbec@...il.com, peterz@...radead.org,
        tglx@...utronix.de, mingo@...nel.org, len.brown@...el.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH] time: tick-sched: use bool for tick_stopped

 From: John Zhao <yuankuiz@...eaurora.org>

Variable tick_stopped returned by tick_nohz_tick_stopped
can only be true / false values. Since the return type
of the tick_nohz_tick_stopped is also bool, variable
tick_stopped nice to have data type as 'bool' in place of
the 'unsigned int'.
Moreover, the executed instructions cost could be minimal
without potiential data type conversion.

Signed-off-by: John Zhao <yuankuiz@...eaurora.org>
---
  kernel/time/tick-sched.h | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/tick-sched.h b/kernel/time/tick-sched.h
index 6de959a..4d34309 100644
--- a/kernel/time/tick-sched.h
+++ b/kernel/time/tick-sched.h
@@ -48,8 +48,8 @@ struct tick_sched {
  	unsigned long			check_clocks;
  	enum tick_nohz_mode		nohz_mode;

+	bool				tick_stopped	: 1;
  	unsigned int			inidle		: 1;
-	unsigned int			tick_stopped	: 1;
  	unsigned int			idle_active	: 1;
  	unsigned int			do_timer_last	: 1;
  	unsigned int			got_idle_tick	: 1;