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cpuidle: Remove unnecessary wrapper cpuidle_get_last_residency() 

cpuidle_get_last_residency() is just a wrapper for retrieving
the last_residency member of struct cpuidle_device.  It's also
weirdly the only wrapper function for accessing cpuidle_* struct
member (by my best guess is it could be a leftover from v2.x).

Anyhow, since the only two users (the ladder and menu governors)
can access dev->last_residency directly, and it's more intuitive to
do it that way, let's just get rid of the wrapper.

This patch tidies up CPU idle code a bit without functional changes.

Signed-off-by: Fieah Lim <kw@fieahl.im>
[ rjw: Changelog cleanup ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Fieah Lim 2018-09-11 03:59:01 +08:00 committed by Rafael J. Wysocki
parent a4a008e53c
commit 6a5f95b5a4
3 changed files with 2 additions and 12 deletions
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2
drivers/cpuidle/governors/ladder.c
View File

@ -80,7 +80,7 @@ static int ladder_select_state(struct cpuidle_driver *drv,
last_state = &ldev->states[last_idx];
last_residency = cpuidle_get_last_residency(dev) - drv->states[last_idx].exit_latency;
last_residency = dev->last_residency - drv->states[last_idx].exit_latency;
/* consider promotion */
if (last_idx < drv->state_count - 1 &&

2
drivers/cpuidle/governors/menu.c
View File

@ -514,7 +514,7 @@ static void menu_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
measured_us = 9 * MAX_INTERESTING / 10;
} else {
/* measured value */
measured_us = cpuidle_get_last_residency(dev);
measured_us = dev->last_residency;
/* Deduct exit latency */
if (measured_us > 2 * target->exit_latency)

10
include/linux/cpuidle.h
View File

@ -99,16 +99,6 @@ struct cpuidle_device {
DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev);
/**
* cpuidle_get_last_residency - retrieves the last state's residency time
* @dev: the target CPU
*/
static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
{
return dev->last_residency;
}
/****************************
* CPUIDLE DRIVER INTERFACE *
****************************/