latency.c: use QoS infrastructure

Replace latency.c use with pm_qos_params use.

Signed-off-by: mark gross <mgross@linux.intel.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 7 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index eb1f82f79153..199ea2146153 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -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