cpuidle: reduce code duplication inside cpuidle_idle_call()

We are doing this twice in cpuidle_idle_call() routine:
	drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP

Would be better if we actually store this in a local variable and
use that. That reduces code duplication and likely makes this piece
of code run faster (in case the compiler wasn't able to optimize it
earlier)

[rjw: Cast the result of bitwise AND to bool explicitly using !!]
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 518b542..86e8059 100644 (file)
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -118,6 +118,7 @@ int cpuidle_idle_call(void)
        struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
        struct cpuidle_driver *drv;
        int next_state, entered_state;
+       bool broadcast;
 
        if (off || !initialized)
                return -ENODEV;
@@ -141,7 +142,9 @@ int cpuidle_idle_call(void)
 
        trace_cpu_idle_rcuidle(next_state, dev->cpu);
 
-       if (drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP)
+       broadcast = !!(drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP);
+
+       if (broadcast)
                clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
                                   &dev->cpu);
 
@@ -151,7 +154,7 @@ int cpuidle_idle_call(void)
        else
                entered_state = cpuidle_enter_state(dev, drv, next_state);
 
-       if (drv->states[next_state].flags & CPUIDLE_FLAG_TIMER_STOP)
+       if (broadcast)
                clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT,
                                   &dev->cpu);