linux-kernel - [tip:sched/core] sched/idle: Drop !! while calculating 'broadcast '

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Message-ID: <tip-89abb5ad10ae8ac3405e635ac80815f781c8b8e9@git.kernel.org>
Date:	Sat, 5 Jul 2014 03:43:58 -0700
From:	tip-bot for Viresh Kumar <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, viresh.kumar@...aro.org, tglx@...utronix.de
Subject: [tip:sched/core] sched/idle: Drop !! while calculating 'broadcast
 '

Commit-ID:  89abb5ad10ae8ac3405e635ac80815f781c8b8e9
Gitweb:     http://git.kernel.org/tip/89abb5ad10ae8ac3405e635ac80815f781c8b8e9
Author:     Viresh Kumar <viresh.kumar@...aro.org>
AuthorDate: Tue, 24 Jun 2014 10:01:01 +0530
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sat, 5 Jul 2014 11:17:31 +0200

sched/idle: Drop !! while calculating 'broadcast'

We don't need 'broadcast' to be set to 'zero or one', but to 'zero or non-zero'
and so the extra operation to convert it to 'zero or one' can be skipped.

Also change type of 'broadcast' to unsigned int, i.e. type of
drv->states[*].flags.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Cc: linaro-kernel@...ts.linaro.org
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/0dfbe2976aa108c53e08d3477ea90f6360c1f54c.1403584026.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/idle.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index cf009fb..9f1608f 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -79,7 +79,7 @@ static void cpuidle_idle_call(void)
 	struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
 	struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
 	int next_state, entered_state;
-	bool broadcast;
+	unsigned int broadcast;
 
 	/*
 	 * Check if the idle task must be rescheduled. If it is the
@@ -135,7 +135,7 @@ use_default:
 		goto exit_idle;
 	}
 
-	broadcast = !!(drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP);
+	broadcast = drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP;
 
 	/*
 	 * Tell the time framework to switch to a broadcast timer
--
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