time: nohz: Expose tick_nohz_enabled

The cpuidle subsystem needs it.

Jean Delvare committed 10 years ago

Commit 46373a11 parent 9c4b2862 files · +3 −1Browse files

Unified · Split

2 files

include/linux/tick.h +2 −0
kernel/time/tick-sched.c +1 −1

include/linux/tick.h+2−0

@@ -98,6 +98,7 @@ static inline void tick_broadcast_exit(void) · 97 unmodified lines
98	98	}
99	99
100	100	#ifdef CONFIG_NO_HZ_COMMON
	101	+extern int tick_nohz_enabled;
101	102	extern int tick_nohz_tick_stopped(void);
102	103	extern void tick_nohz_idle_enter(void);
103	104	extern void tick_nohz_idle_exit(void);
@@ -106,6 +107,7 @@ extern ktime_t tick_nohz_get_sleep_length(void); · 2 unmodified lines
106	107	extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time);
107	108	extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time);
108	109	#else /* !CONFIG_NO_HZ_COMMON */
	110	+#define tick_nohz_enabled (0)
109	111	static inline int tick_nohz_tick_stopped(void) { return 0; }
110	112	static inline void tick_nohz_idle_enter(void) { }
111	113	static inline void tick_nohz_idle_exit(void) { }

kernel/time/tick-sched.c+1−1

@@ -387,7 +387,7 @@ void __init tick_nohz_init(void) · 386 unmodified lines
387	387	/*
388	388	* NO HZ enabled ?
389	389	*/
390		−static int tick_nohz_enabled __read_mostly = 1;
	390	+int tick_nohz_enabled __read_mostly = 1;
391	391	unsigned long tick_nohz_active __read_mostly;
392	392	/*
393	393	* Enable / Disable tickless mode