Merge branch 'processor-procfs-2.6.32' into release
[sfrench/cifs-2.6.git] / drivers / acpi / processor_idle.c
index b85d9f02271662922a7ab76ceefdd53d1bc6ed1a..cc61a6220102e50e73d89163ce94a4e762f72f3d 100644 (file)
@@ -60,6 +60,8 @@
 #include <acpi/processor.h>
 #include <asm/processor.h>
 
+#define PREFIX "ACPI: "
+
 #define ACPI_PROCESSOR_CLASS            "processor"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_idle");
@@ -139,7 +141,7 @@ static void acpi_safe_halt(void)
  * are affected too. We pick the most conservative approach: we assume
  * that the local APIC stops in both C2 and C3.
  */
-static void acpi_timer_check_state(int state, struct acpi_processor *pr,
+static void lapic_timer_check_state(int state, struct acpi_processor *pr,
                                   struct acpi_processor_cx *cx)
 {
        struct acpi_processor_power *pwr = &pr->power;
@@ -162,8 +164,9 @@ static void acpi_timer_check_state(int state, struct acpi_processor *pr,
                pr->power.timer_broadcast_on_state = state;
 }
 
-static void acpi_propagate_timer_broadcast(struct acpi_processor *pr)
+static void lapic_timer_propagate_broadcast(void *arg)
 {
+       struct acpi_processor *pr = (struct acpi_processor *) arg;
        unsigned long reason;
 
        reason = pr->power.timer_broadcast_on_state < INT_MAX ?
@@ -173,7 +176,7 @@ static void acpi_propagate_timer_broadcast(struct acpi_processor *pr)
 }
 
 /* Power(C) State timer broadcast control */
-static void acpi_state_timer_broadcast(struct acpi_processor *pr,
+static void lapic_timer_state_broadcast(struct acpi_processor *pr,
                                       struct acpi_processor_cx *cx,
                                       int broadcast)
 {
@@ -190,10 +193,10 @@ static void acpi_state_timer_broadcast(struct acpi_processor *pr,
 
 #else
 
-static void acpi_timer_check_state(int state, struct acpi_processor *pr,
+static void lapic_timer_check_state(int state, struct acpi_processor *pr,
                                   struct acpi_processor_cx *cstate) { }
-static void acpi_propagate_timer_broadcast(struct acpi_processor *pr) { }
-static void acpi_state_timer_broadcast(struct acpi_processor *pr,
+static void lapic_timer_propagate_broadcast(struct acpi_processor *pr) { }
+static void lapic_timer_state_broadcast(struct acpi_processor *pr,
                                       struct acpi_processor_cx *cx,
                                       int broadcast)
 {
@@ -515,7 +518,8 @@ static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
 static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
                                           struct acpi_processor_cx *cx)
 {
-       static int bm_check_flag;
+       static int bm_check_flag = -1;
+       static int bm_control_flag = -1;
 
 
        if (!cx->address)
@@ -545,12 +549,14 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
        }
 
        /* All the logic here assumes flags.bm_check is same across all CPUs */
-       if (!bm_check_flag) {
+       if (bm_check_flag == -1) {
                /* Determine whether bm_check is needed based on CPU  */
                acpi_processor_power_init_bm_check(&(pr->flags), pr->id);
                bm_check_flag = pr->flags.bm_check;
+               bm_control_flag = pr->flags.bm_control;
        } else {
                pr->flags.bm_check = bm_check_flag;
+               pr->flags.bm_control = bm_control_flag;
        }
 
        if (pr->flags.bm_check) {
@@ -614,29 +620,26 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
                switch (cx->type) {
                case ACPI_STATE_C1:
                        cx->valid = 1;
-                       acpi_timer_check_state(i, pr, cx);
                        break;
 
                case ACPI_STATE_C2:
                        acpi_processor_power_verify_c2(cx);
-                       if (cx->valid)
-                               acpi_timer_check_state(i, pr, cx);
                        break;
 
                case ACPI_STATE_C3:
                        acpi_processor_power_verify_c3(pr, cx);
-                       if (cx->valid)
-                               acpi_timer_check_state(i, pr, cx);
                        break;
                }
-               if (cx->valid)
-                       tsc_check_state(cx->type);
+               if (!cx->valid)
+                       continue;
 
-               if (cx->valid)
-                       working++;
+               lapic_timer_check_state(i, pr, cx);
+               tsc_check_state(cx->type);
+               working++;
        }
 
-       acpi_propagate_timer_broadcast(pr);
+       smp_call_function_single(pr->id, lapic_timer_propagate_broadcast,
+                                pr, 1);
 
        return (working);
 }
@@ -840,7 +843,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
                return 0;
        }
 
-       acpi_state_timer_broadcast(pr, cx, 1);
+       lapic_timer_state_broadcast(pr, cx, 1);
        kt1 = ktime_get_real();
        acpi_idle_do_entry(cx);
        kt2 = ktime_get_real();
@@ -848,7 +851,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 
        local_irq_enable();
        cx->usage++;
-       acpi_state_timer_broadcast(pr, cx, 0);
+       lapic_timer_state_broadcast(pr, cx, 0);
 
        return idle_time;
 }
@@ -893,7 +896,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
         * Must be done before busmaster disable as we might need to
         * access HPET !
         */
-       acpi_state_timer_broadcast(pr, cx, 1);
+       lapic_timer_state_broadcast(pr, cx, 1);
 
        if (cx->type == ACPI_STATE_C3)
                ACPI_FLUSH_CPU_CACHE();
@@ -915,7 +918,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 
        cx->usage++;
 
-       acpi_state_timer_broadcast(pr, cx, 0);
+       lapic_timer_state_broadcast(pr, cx, 0);
        cx->time += sleep_ticks;
        return idle_time;
 }
@@ -982,7 +985,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         * Must be done before busmaster disable as we might need to
         * access HPET !
         */
-       acpi_state_timer_broadcast(pr, cx, 1);
+       lapic_timer_state_broadcast(pr, cx, 1);
 
        kt1 = ktime_get_real();
        /*
@@ -1027,7 +1030,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 
        cx->usage++;
 
-       acpi_state_timer_broadcast(pr, cx, 0);
+       lapic_timer_state_broadcast(pr, cx, 0);
        cx->time += sleep_ticks;
        return idle_time;
 }