From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Delvare Subject: [PATCH 1/3] Subject: nohz: Expose tick_nohz_enabled Date: Mon, 11 Jan 2016 17:40:31 +0100 Message-ID: <20160111174031.6cc73575@endymion.delvare> References: <20160111173915.63ec1bcd@endymion.delvare> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.suse.de ([195.135.220.15]:49897 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761187AbcAKQkh (ORCPT ); Mon, 11 Jan 2016 11:40:37 -0500 In-Reply-To: <20160111173915.63ec1bcd@endymion.delvare> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-pm@vger.kernel.org Cc: Thomas Gleixner , Zhang Rui , "Rafael J. Wysocki" , Daniel Lezcano The cpuidle subsystem needs it. Signed-off-by: Jean Delvare Cc: Thomas Gleixner Cc: Zhang Rui --- include/linux/tick.h | 2 ++ kernel/time/tick-sched.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) --- linux-4.4.orig/include/linux/tick.h 2016-01-11 00:01:32.000000000 +0100 +++ linux-4.4/include/linux/tick.h 2016-01-11 15:10:46.334547548 +0100 @@ -98,6 +98,7 @@ static inline void tick_broadcast_exit(v } #ifdef CONFIG_NO_HZ_COMMON +extern int tick_nohz_enabled; extern int tick_nohz_tick_stopped(void); extern void tick_nohz_idle_enter(void); extern void tick_nohz_idle_exit(void); @@ -106,6 +107,7 @@ extern ktime_t tick_nohz_get_sleep_lengt extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); #else /* !CONFIG_NO_HZ_COMMON */ +#define tick_nohz_enabled (0) static inline int tick_nohz_tick_stopped(void) { return 0; } static inline void tick_nohz_idle_enter(void) { } static inline void tick_nohz_idle_exit(void) { } --- linux-4.4.orig/kernel/time/tick-sched.c 2016-01-11 15:06:54.776653477 +0100 +++ linux-4.4/kernel/time/tick-sched.c 2016-01-11 15:09:19.022700899 +0100 @@ -387,7 +387,7 @@ void __init tick_nohz_init(void) /* * NO HZ enabled ? */ -static int tick_nohz_enabled __read_mostly = 1; +int tick_nohz_enabled __read_mostly = 1; unsigned long tick_nohz_active __read_mostly; /* * Enable / Disable tickless mode -- Jean Delvare SUSE L3 Support