clockevents: optimise tick_nohz_stop_sched_tick() a bit

Call
	ts = &per_cpu(tick_cpu_sched, cpu);
and
	cpu = smp_processor_id();
once instead of twice.

No functional change done, as changed code runs with local irq off.
Reduces source lines and text size (20bytes on x86_64).

[ akpm@linux-foundation.org: Build fix ]

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 686da821d376b01dd21d379bfd8baf39d6b106f1..69dba0c71727b70828fbd9b3122392feba4c2f3c 100644 (file)
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -158,9 +158,8 @@ void tick_nohz_stop_idle(int cpu)
        }
 }
 
-static ktime_t tick_nohz_start_idle(int cpu)
+static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
 {
-       struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
        ktime_t now, delta;
 
        now = ktime_get();
@@ -201,8 +200,8 @@ void tick_nohz_stop_sched_tick(void)
        local_irq_save(flags);
 
        cpu = smp_processor_id();
-       now = tick_nohz_start_idle(cpu);
        ts = &per_cpu(tick_cpu_sched, cpu);
+       now = tick_nohz_start_idle(ts);
 
        /*
         * If this cpu is offline and it is the one which updates
@@ -222,7 +221,6 @@ void tick_nohz_stop_sched_tick(void)
        if (need_resched())
                goto end;
 
-       cpu = smp_processor_id();
        if (unlikely(local_softirq_pending())) {
                static int ratelimit;