Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull ACPI & Power Management changes from Len Brown:
 - ACPI 5.0 after-ripples, ACPICA/Linux divergence cleanup
 - cpuidle evolving, more ARM use
 - thermal sub-system evolving, ditto
 - assorted other PM bits

Fix up conflicts in various cpuidle implementations due to ARM cpuidle
cleanups (ARM at91 self-refresh and cpu idle code rewritten into
"standby" in asm conflicting with the consolidation of cpuidle time
keeping), trivial SH include file context conflict and RCU tracing fixes
in generic code.

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (77 commits)
  ACPI throttling: fix endian bug in acpi_read_throttling_status()
  Disable MCP limit exceeded messages from Intel IPS driver
  ACPI video: Don't start video device until its associated input device has been allocated
  ACPI video: Harden video bus adding.
  ACPI: Add support for exposing BGRT data
  ACPI: export acpi_kobj
  ACPI: Fix logic for removing mappings in 'acpi_unmap'
  CPER failed to handle generic error records with multiple sections
  ACPI: Clean redundant codes in scan.c
  ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
  ACPI: consistently use should_use_kmap()
  PNPACPI: Fix device ref leaking in acpi_pnp_match
  ACPI: Fix use-after-free in acpi_map_lsapic
  ACPI: processor_driver: add missing kfree
  ACPI, APEI: Fix incorrect APEI register bit width check and usage
  Update documentation for parameter *notrigger* in einj.txt
  ACPI, APEI, EINJ, new parameter to control trigger action
  ACPI, APEI, EINJ, limit the range of einj_param
  ACPI, APEI, Fix ERST header length check
  cpuidle: power_usage should be declared signed integer
  ...

1 files changed, 89 insertions, 8 deletions

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 6588f43017bd..87411cebc577 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -53,6 +53,52 @@ static void cpuidle_kick_cpus(void) {}
 
 static int __cpuidle_register_device(struct cpuidle_device *dev);
 
+static inline int cpuidle_enter(struct cpuidle_device *dev,
+                                struct cpuidle_driver *drv, int index)
+{
+        struct cpuidle_state *target_state = &drv->states[index];
+        return target_state->enter(dev, drv, index);
+}
+
+static inline int cpuidle_enter_tk(struct cpuidle_device *dev,
+                               struct cpuidle_driver *drv, int index)
+{
+        return cpuidle_wrap_enter(dev, drv, index, cpuidle_enter);
+}
+
+typedef int (*cpuidle_enter_t)(struct cpuidle_device *dev,
+                               struct cpuidle_driver *drv, int index);
+
+static cpuidle_enter_t cpuidle_enter_ops;
+
+/**
+ * cpuidle_play_dead - cpu off-lining
+ *
+ * Only returns in case of an error
+ */
+int cpuidle_play_dead(void)
+{
+        struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
+        struct cpuidle_driver *drv = cpuidle_get_driver();
+        int i, dead_state = -1;
+        int power_usage = -1;
+
+        /* Find lowest-power state that supports long-term idle */
+        for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++) {
+                struct cpuidle_state *s = &drv->states[i];
+
+                if (s->power_usage < power_usage && s->enter_dead) {
+                        power_usage = s->power_usage;
+                        dead_state = i;
+                }
+        }
+
+        if (dead_state != -1)
+                return drv->states[dead_state].enter_dead(dev, dead_state);
+
+        return -ENODEV;
+}
+
 /**
  * cpuidle_idle_call - the main idle loop
  *
@@ -63,7 +109,6 @@ int cpuidle_idle_call(void)
 {
         struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
         struct cpuidle_driver *drv = cpuidle_get_driver();
-        struct cpuidle_state *target_state;
         int next_state, entered_state;
 
         if (off)
@@ -92,12 +137,10 @@ int cpuidle_idle_call(void)
                 return 0;
         }
 
-        target_state = &drv->states[next_state];
-
         trace_power_start_rcuidle(POWER_CSTATE, next_state, dev->cpu);
         trace_cpu_idle_rcuidle(next_state, dev->cpu);
 
-        entered_state = target_state->enter(dev, drv, next_state);
+        entered_state = cpuidle_enter_ops(dev, drv, next_state);
 
         trace_power_end_rcuidle(dev->cpu);
         trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
@@ -110,6 +153,8 @@ int cpuidle_idle_call(void)
                 dev->states_usage[entered_state].time +=
                                 (unsigned long long)dev->last_residency;
                 dev->states_usage[entered_state].usage++;
+        } else {
+                dev->last_residency = 0;
         }
 
         /* give the governor an opportunity to reflect on the outcome */
@@ -164,6 +209,37 @@ void cpuidle_resume_and_unlock(void)
 
 EXPORT_SYMBOL_GPL(cpuidle_resume_and_unlock);
 
+/**
+ * cpuidle_wrap_enter - performs timekeeping and irqen around enter function
+ * @dev: pointer to a valid cpuidle_device object
+ * @drv: pointer to a valid cpuidle_driver object
+ * @index: index of the target cpuidle state.
+ */
+int cpuidle_wrap_enter(struct cpuidle_device *dev,
+                                struct cpuidle_driver *drv, int index,
+                                int (*enter)(struct cpuidle_device *dev,
+                                        struct cpuidle_driver *drv, int index))
+{
+        ktime_t time_start, time_end;
+        s64 diff;
+
+        time_start = ktime_get();
+
+        index = enter(dev, drv, index);
+
+        time_end = ktime_get();
+
+        local_irq_enable();
+
+        diff = ktime_to_us(ktime_sub(time_end, time_start));
+        if (diff > INT_MAX)
+                diff = INT_MAX;
+
+        dev->last_residency = (int) diff;
+
+        return index;
+}
+
 #ifdef CONFIG_ARCH_HAS_CPU_RELAX
 static int poll_idle(struct cpuidle_device *dev,
                 struct cpuidle_driver *drv, int index)
@@ -197,6 +273,7 @@ static void poll_idle_init(struct cpuidle_driver *drv)
         state->power_usage = -1;
         state->flags = 0;
         state->enter = poll_idle;
+        state->disable = 0;
 }
 #else
 static void poll_idle_init(struct cpuidle_driver *drv) {}
@@ -212,13 +289,14 @@ static void poll_idle_init(struct cpuidle_driver *drv) {}
 int cpuidle_enable_device(struct cpuidle_device *dev)
 {
         int ret, i;
+        struct cpuidle_driver *drv = cpuidle_get_driver();
 
         if (dev->enabled)
                 return 0;
-        if (!cpuidle_get_driver() || !cpuidle_curr_governor)
+        if (!drv || !cpuidle_curr_governor)
                 return -EIO;
         if (!dev->state_count)
-                return -EINVAL;
+                dev->state_count = drv->state_count;
 
         if (dev->registered == 0) {
                 ret = __cpuidle_register_device(dev);
@@ -226,13 +304,16 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
                         return ret;
         }
 
-        poll_idle_init(cpuidle_get_driver());
+        cpuidle_enter_ops = drv->en_core_tk_irqen ?
+                cpuidle_enter_tk : cpuidle_enter;
+
+        poll_idle_init(drv);
 
         if ((ret = cpuidle_add_state_sysfs(dev)))
                 return ret;
 
         if (cpuidle_curr_governor->enable &&
-            (ret = cpuidle_curr_governor->enable(cpuidle_get_driver(), dev)))
+            (ret = cpuidle_curr_governor->enable(drv, dev)))
                 goto fail_sysfs;
 
         for (i = 0; i < dev->state_count; i++) {