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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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Amit Kucheria <amit.kucheria@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2020-02-12 00:37:11 +01:00
parent b8e6e27c62
commit 814d51f888
2 changed files with 15 additions and 0 deletions
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13
include/linux/pm_qos.h
View File

@ -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);

2
kernel/power/qos.c
View File

@ -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. */