A few functions use remote per CPU access APIs when they deal with local values.
Just to the right conversion to improve performance, code readability and debug checks. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Fernando Luis Vazquez Cao <[email protected]> Cc: Tetsuo Handa <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Arjan van de Ven <[email protected]> --- kernel/time/tick-sched.c | 10 ++++------ 1 files changed, 4 insertions(+), 6 deletions(-) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 017bec2..11d64e2 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -395,11 +395,9 @@ __setup("nohz=", setup_tick_nohz); */ static void tick_nohz_update_jiffies(ktime_t now) { - int cpu = smp_processor_id(); - struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); unsigned long flags; - ts->idle_waketime = now; + __this_cpu_write(tick_cpu_sched.idle_waketime, now); local_irq_save(flags); tick_do_update_jiffies64(now); @@ -410,7 +408,7 @@ static void tick_nohz_update_jiffies(ktime_t now) static void tick_nohz_stop_idle(int cpu, ktime_t now) { - struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); + struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); ktime_t delta; /* Updates the per cpu time idle statistics counters */ @@ -901,7 +899,7 @@ static void tick_nohz_account_idle_ticks(struct tick_sched *ts) void tick_nohz_idle_exit(void) { int cpu = smp_processor_id(); - struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); + struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); ktime_t now; local_irq_disable(); @@ -1020,7 +1018,7 @@ static void tick_nohz_kick_tick(int cpu, ktime_t now) static inline void tick_check_nohz(int cpu) { - struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); + struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); ktime_t now; if (!ts->idle_active && !ts->tick_stopped) -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
