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latency.c: use QoS infrastructure

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Replace latency.c use with pm_qos_params use.

Signed-off-by: mark gross <[email protected]>
Cc: "John W. Linville" <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Mark Gross 2008-02-04 22:30:09 -08:00 • committed by Linus Torvalds
commit f011e2e2df
6 changed files with 26 additions and 322 deletions
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18
drivers/acpi/processor_idle.c
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@ -38,7 +38,7 @@
#include <linux/dmi.h>
#include <linux/moduleparam.h>
#include <linux/sched.h> /* need_resched() */
#include <linux/latency.h>
#include <linux/pm_qos_params.h>
#include <linux/clockchips.h>
#include <linux/cpuidle.h>
@ -648,7 +648,8 @@ static void acpi_processor_idle(void)
if (cx->promotion.state &&
((cx->promotion.state - pr->power.states) <= max_cstate)) {
if (sleep_ticks > cx->promotion.threshold.ticks &&
cx->promotion.state->latency <= system_latency_constraint()) {
cx->promotion.state->latency <=
pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY)) {
cx->promotion.count++;
cx->demotion.count = 0;
if (cx->promotion.count >=
@ -692,7 +693,8 @@ static void acpi_processor_idle(void)
* or if the latency of the current state is unacceptable
*/
if ((pr->power.state - pr->power.states) > max_cstate ||
pr->power.state->latency > system_latency_constraint()) {
pr->power.state->latency >
pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY)) {
if (cx->demotion.state)
next_state = cx->demotion.state;
}
@ -1200,7 +1202,7 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
"maximum allowed latency: %d usec\n",
pr->power.state ? pr->power.state - pr->power.states : 0,
max_cstate, (unsigned)pr->power.bm_activity,
system_latency_constraint());
pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY));
seq_puts(seq, "states:\n");
@ -1718,8 +1720,9 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
"ACPI: processor limited to max C-state %d\n",
max_cstate);
first_run++;
#if !defined (CONFIG_CPU_IDLE) && defined (CONFIG_SMP)
register_latency_notifier(&acpi_processor_latency_notifier);
#if !defined(CONFIG_CPU_IDLE) && defined(CONFIG_SMP)
pm_qos_add_notifier(PM_QOS_CPU_DMA_LATENCY,
&acpi_processor_latency_notifier);
#endif
}
@ -1806,7 +1809,8 @@ int acpi_processor_power_exit(struct acpi_processor *pr,
*/
cpu_idle_wait();
#ifdef CONFIG_SMP
unregister_latency_notifier(&acpi_processor_latency_notifier);
pm_qos_remove_notifier(PM_QOS_CPU_DMA_LATENCY,
&acpi_processor_latency_notifier);
#endif
}
#endif