lkml.org 
[lkml]   [2014]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
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@linaro.org>
AuthorDate: Tue, 24 Jun 2014 10:01:01 +0530
Committer: Ingo Molnar <mingo@kernel.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@linaro.org>
Cc: linaro-kernel@lists.linaro.org
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/0dfbe2976aa108c53e08d3477ea90f6360c1f54c.1403584026.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.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

\
 
 \ /
  Last update: 2014-07-05 13:41    [W:0.078 / U:1.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site