Commit 814d51f8 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

PM: QoS: Make CPU latency QoS depend on CONFIG_CPU_IDLE 



Because cpuidle is the only user of the effective constraint coming
from the CPU latency QoS, add #ifdef CONFIG_CPU_IDLE around that code
to avoid building it unnecessarily.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: default avatarAmit Kucheria <amit.kucheria@linaro.org>
Tested-by: default avatarAmit Kucheria <amit.kucheria@linaro.org>
parent b8e6e27c

include/linux/pm_qos.h

+13 −0
Original line number Diff line number Diff line
@@ -143,11 +143,24 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf, 
			 struct pm_qos_flags_request *req,

			 enum pm_qos_req_action action, s32 val);



#ifdef CONFIG_CPU_IDLE

s32 cpu_latency_qos_limit(void);

bool cpu_latency_qos_request_active(struct pm_qos_request *req);

void cpu_latency_qos_add_request(struct pm_qos_request *req, s32 value);

void cpu_latency_qos_update_request(struct pm_qos_request *req, s32 new_value);

void cpu_latency_qos_remove_request(struct pm_qos_request *req);

#else

static inline s32 cpu_latency_qos_limit(void) { return INT_MAX; }

static inline bool cpu_latency_qos_request_active(struct pm_qos_request *req)

{

	return false;

}

static inline void cpu_latency_qos_add_request(struct pm_qos_request *req,

					       s32 value) {}

static inline void cpu_latency_qos_update_request(struct pm_qos_request *req,

						  s32 new_value) {}

static inline void cpu_latency_qos_remove_request(struct pm_qos_request *req) {}

#endif



#ifdef CONFIG_PM

enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);

kernel/power/qos.c

+2 −0
Original line number Diff line number Diff line
@@ -209,6 +209,7 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf, 
	return prev_value != curr_value;

}



#ifdef CONFIG_CPU_IDLE

/* Definitions related to the CPU latency QoS. */



static struct pm_qos_constraints cpu_latency_constraints = {
@@ -421,6 +422,7 @@ static int __init cpu_latency_qos_init(void) 
	return ret;

}

late_initcall(cpu_latency_qos_init);

#endif /* CONFIG_CPU_IDLE */



/* Definitions related to the frequency QoS below. */