9 files changed, 64 insertions, 62 deletions

diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index bd3c937b0ac0..7737afb157c3 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -90,7 +90,6 @@ static const struct acpi_port_info acpi_protected_ports[] = {
         {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
         {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
         {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
-        {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
         {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
         {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP},
         {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index b0de6312919a..3c7d8942f23b 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -903,7 +903,7 @@ static struct acpi_driver acpi_battery_driver = {
                 },
 };
 
-static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
+static void acpi_battery_init_async(void *unused, async_cookie_t cookie)
 {
         if (acpi_disabled)
                 return;
diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c
index 05dfdc96802e..d0d550d22a6d 100644
--- a/drivers/acpi/proc.c
+++ b/drivers/acpi/proc.c
@@ -343,9 +343,6 @@ acpi_system_write_alarm(struct file *file,
 }
 #endif                          /* HAVE_ACPI_LEGACY_ALARM */
 
-extern struct list_head acpi_wakeup_device_list;
-extern spinlock_t acpi_device_lock;
-
 static int
 acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
 {
@@ -353,7 +350,7 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
 
         seq_printf(seq, "Device\tS-state\t  Status   Sysfs node\n");
 
-        spin_lock(&acpi_device_lock);
+        mutex_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev =
                     container_of(node, struct acpi_device, wakeup_list);
@@ -361,7 +358,6 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
 
                 if (!dev->wakeup.flags.valid)
                         continue;
-                spin_unlock(&acpi_device_lock);
 
                 ldev = acpi_get_physical_device(dev->handle);
                 seq_printf(seq, "%s\t  S%d\t%c%-8s  ",
@@ -376,9 +372,8 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
                 seq_printf(seq, "\n");
                 put_device(ldev);
 
-                spin_lock(&acpi_device_lock);
         }
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
         return 0;
 }
 
@@ -409,7 +404,7 @@ acpi_system_write_wakeup_device(struct file *file,
         strbuf[len] = '\0';
         sscanf(strbuf, "%s", str);
 
-        spin_lock(&acpi_device_lock);
+        mutex_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev =
                     container_of(node, struct acpi_device, wakeup_list);
@@ -446,7 +441,7 @@ acpi_system_write_wakeup_device(struct file *file,
                         }
                 }
         }
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
         return count;
 }
 
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 4e6e758bd397..6fe121434ffb 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -145,6 +145,9 @@ static void acpi_timer_check_state(int state, struct acpi_processor *pr,
         struct acpi_processor_power *pwr = &pr->power;
         u8 type = local_apic_timer_c2_ok ? ACPI_STATE_C3 : ACPI_STATE_C2;
 
+        if (cpu_has(&cpu_data(pr->id), X86_FEATURE_ARAT))
+                return;
+
         /*
          * Check, if one of the previous states already marked the lapic
          * unstable
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 20c23c049207..8ff510b91d88 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -24,7 +24,7 @@ extern struct acpi_device *acpi_root;
 
 static LIST_HEAD(acpi_device_list);
 static LIST_HEAD(acpi_bus_id_list);
-DEFINE_SPINLOCK(acpi_device_lock);
+DEFINE_MUTEX(acpi_device_lock);
 LIST_HEAD(acpi_wakeup_device_list);
 
 struct acpi_device_bus_id{
@@ -491,7 +491,6 @@ static int acpi_device_register(struct acpi_device *device,
          */
         INIT_LIST_HEAD(&device->children);
         INIT_LIST_HEAD(&device->node);
-        INIT_LIST_HEAD(&device->g_list);
         INIT_LIST_HEAD(&device->wakeup_list);
 
         new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
@@ -500,7 +499,7 @@ static int acpi_device_register(struct acpi_device *device,
                 return -ENOMEM;
         }
 
-        spin_lock(&acpi_device_lock);
+        mutex_lock(&acpi_device_lock);
         /*
          * Find suitable bus_id and instance number in acpi_bus_id_list
          * If failed, create one and link it into acpi_bus_id_list
@@ -521,14 +520,12 @@ static int acpi_device_register(struct acpi_device *device,
         }
         dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
 
-        if (device->parent) {
+        if (device->parent)
                 list_add_tail(&device->node, &device->parent->children);
-                list_add_tail(&device->g_list, &device->parent->g_list);
-        } else
-                list_add_tail(&device->g_list, &acpi_device_list);
+
         if (device->wakeup.flags.valid)
                 list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
 
         if (device->parent)
                 device->dev.parent = &parent->dev;
@@ -549,28 +546,22 @@ static int acpi_device_register(struct acpi_device *device,
         device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
         return 0;
   end:
-        spin_lock(&acpi_device_lock);
-        if (device->parent) {
+        mutex_lock(&acpi_device_lock);
+        if (device->parent)
                 list_del(&device->node);
-                list_del(&device->g_list);
-        } else
-                list_del(&device->g_list);
         list_del(&device->wakeup_list);
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
         return result;
 }
 
 static void acpi_device_unregister(struct acpi_device *device, int type)
 {
-        spin_lock(&acpi_device_lock);
-        if (device->parent) {
+        mutex_lock(&acpi_device_lock);
+        if (device->parent)
                 list_del(&device->node);
-                list_del(&device->g_list);
-        } else
-                list_del(&device->g_list);
 
         list_del(&device->wakeup_list);
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
 
         acpi_detach_data(device->handle, acpi_bus_data_handler);
 
diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
index cfaf8f5b0a14..8a8f3b3382a6 100644
--- a/drivers/acpi/sleep.h
+++ b/drivers/acpi/sleep.h
@@ -5,3 +5,6 @@ extern int acpi_suspend (u32 state);
 extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
 extern void acpi_enable_wakeup_device(u8 sleep_state);
 extern void acpi_disable_wakeup_device(u8 sleep_state);
+
+extern struct list_head acpi_wakeup_device_list;
+extern struct mutex acpi_device_lock;
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 0914eaa9a097..9cd15e8c8932 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -194,6 +194,7 @@ struct acpi_thermal {
         struct acpi_handle_list devices;
         struct thermal_zone_device *thermal_zone;
         int tz_enabled;
+        int kelvin_offset;
         struct mutex lock;
 };
 
@@ -583,7 +584,7 @@ static void acpi_thermal_check(void *data)
 }
 
 /* sys I/F for generic thermal sysfs support */
-#define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
+#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
 
 static int thermal_get_temp(struct thermal_zone_device *thermal,
                             unsigned long *temp)
@@ -598,7 +599,7 @@ static int thermal_get_temp(struct thermal_zone_device *thermal,
         if (result)
                 return result;
 
-        *temp = KELVIN_TO_MILLICELSIUS(tz->temperature);
+        *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
         return 0;
 }
 
@@ -704,7 +705,8 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
         if (tz->trips.critical.flags.valid) {
                 if (!trip) {
                         *temp = KELVIN_TO_MILLICELSIUS(
-                                tz->trips.critical.temperature);
+                                tz->trips.critical.temperature,
+                                tz->kelvin_offset);
                         return 0;
                 }
                 trip--;
@@ -713,7 +715,8 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
         if (tz->trips.hot.flags.valid) {
                 if (!trip) {
                         *temp = KELVIN_TO_MILLICELSIUS(
-                                tz->trips.hot.temperature);
+                                tz->trips.hot.temperature,
+                                tz->kelvin_offset);
                         return 0;
                 }
                 trip--;
@@ -722,7 +725,8 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
         if (tz->trips.passive.flags.valid) {
                 if (!trip) {
                         *temp = KELVIN_TO_MILLICELSIUS(
-                                tz->trips.passive.temperature);
+                                tz->trips.passive.temperature,
+                                tz->kelvin_offset);
                         return 0;
                 }
                 trip--;
@@ -732,7 +736,8 @@ static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
                 tz->trips.active[i].flags.valid; i++) {
                 if (!trip) {
                         *temp = KELVIN_TO_MILLICELSIUS(
-                                tz->trips.active[i].temperature);
+                                tz->trips.active[i].temperature,
+                                tz->kelvin_offset);
                         return 0;
                 }
                 trip--;
@@ -747,7 +752,8 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
 
         if (tz->trips.critical.flags.valid) {
                 *temperature = KELVIN_TO_MILLICELSIUS(
-                                tz->trips.critical.temperature);
+                                tz->trips.critical.temperature,
+                                tz->kelvin_offset);
                 return 0;
         } else
                 return -EINVAL;
@@ -1331,6 +1337,25 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
         return 0;
 }
 
+/*
+ * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
+ * handles temperature values with a single decimal place. As a consequence,
+ * some implementations use an offset of 273.1 and others use an offset of
+ * 273.2. Try to find out which one is being used, to present the most
+ * accurate and visually appealing number.
+ *
+ * The heuristic below should work for all ACPI thermal zones which have a
+ * critical trip point with a value being a multiple of 0.5 degree Celsius.
+ */
+static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
+{
+        if (tz->trips.critical.flags.valid &&
+            (tz->trips.critical.temperature % 5) == 1)
+                tz->kelvin_offset = 2731;
+        else
+                tz->kelvin_offset = 2732;
+}
+
 static int acpi_thermal_add(struct acpi_device *device)
 {
         int result = 0;
@@ -1356,6 +1381,8 @@ static int acpi_thermal_add(struct acpi_device *device)
         if (result)
                 goto free_memory;
 
+        acpi_thermal_guess_offset(tz);
+
         result = acpi_thermal_register_thermal_zone(tz);
         if (result)
                 goto free_memory;
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index 5aee8c26cc9f..88725dcdf8bc 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -12,12 +12,14 @@
 #include "internal.h"
 #include "sleep.h"
 
+/*
+ * We didn't lock acpi_device_lock in the file, because it invokes oops in
+ * suspend/resume and isn't really required as this is called in S-state. At
+ * that time, there is no device hotplug
+ **/
 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("wakeup_devices")
 
-extern struct list_head acpi_wakeup_device_list;
-extern spinlock_t acpi_device_lock;
-
 /**
  * acpi_enable_wakeup_device_prep - prepare wakeup devices
  *      @sleep_state:   ACPI state
@@ -29,7 +31,6 @@ void acpi_enable_wakeup_device_prep(u8 sleep_state)
 {
         struct list_head *node, *next;
 
-        spin_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev = container_of(node,
                                                        struct acpi_device,
@@ -40,11 +41,8 @@ void acpi_enable_wakeup_device_prep(u8 sleep_state)
                     (sleep_state > (u32) dev->wakeup.sleep_state))
                         continue;
 
-                spin_unlock(&acpi_device_lock);
                 acpi_enable_wakeup_device_power(dev, sleep_state);
-                spin_lock(&acpi_device_lock);
         }
-        spin_unlock(&acpi_device_lock);
 }
 
 /**
@@ -60,7 +58,6 @@ void acpi_enable_wakeup_device(u8 sleep_state)
          * Caution: this routine must be invoked when interrupt is disabled 
          * Refer ACPI2.0: P212
          */
-        spin_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev =
                         container_of(node, struct acpi_device, wakeup_list);
@@ -74,22 +71,17 @@ void acpi_enable_wakeup_device(u8 sleep_state)
                 if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
                     || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
-                                spin_unlock(&acpi_device_lock);
                                 /* set_gpe_type will disable GPE, leave it like that */
                                 acpi_set_gpe_type(dev->wakeup.gpe_device,
                                                   dev->wakeup.gpe_number,
                                                   ACPI_GPE_TYPE_RUNTIME);
-                                spin_lock(&acpi_device_lock);
                         }
                         continue;
                 }
-                spin_unlock(&acpi_device_lock);
                 if (!dev->wakeup.flags.run_wake)
                         acpi_enable_gpe(dev->wakeup.gpe_device,
                                         dev->wakeup.gpe_number);
-                spin_lock(&acpi_device_lock);
         }
-        spin_unlock(&acpi_device_lock);
 }
 
 /**
@@ -101,7 +93,6 @@ void acpi_disable_wakeup_device(u8 sleep_state)
 {
         struct list_head *node, *next;
 
-        spin_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev =
                         container_of(node, struct acpi_device, wakeup_list);
@@ -112,19 +103,16 @@ void acpi_disable_wakeup_device(u8 sleep_state)
                 if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
                     || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
-                                spin_unlock(&acpi_device_lock);
                                 acpi_set_gpe_type(dev->wakeup.gpe_device,
                                                   dev->wakeup.gpe_number,
                                                   ACPI_GPE_TYPE_WAKE_RUN);
                                 /* Re-enable it, since set_gpe_type will disable it */
                                 acpi_enable_gpe(dev->wakeup.gpe_device,
                                                 dev->wakeup.gpe_number);
-                                spin_lock(&acpi_device_lock);
                         }
                         continue;
                 }
 
-                spin_unlock(&acpi_device_lock);
                 acpi_disable_wakeup_device_power(dev);
                 /* Never disable run-wake GPE */
                 if (!dev->wakeup.flags.run_wake) {
@@ -133,16 +121,14 @@ void acpi_disable_wakeup_device(u8 sleep_state)
                         acpi_clear_gpe(dev->wakeup.gpe_device,
                                        dev->wakeup.gpe_number, ACPI_NOT_ISR);
                 }
-                spin_lock(&acpi_device_lock);
         }
-        spin_unlock(&acpi_device_lock);
 }
 
 int __init acpi_wakeup_device_init(void)
 {
         struct list_head *node, *next;
 
-        spin_lock(&acpi_device_lock);
+        mutex_lock(&acpi_device_lock);
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev = container_of(node,
                                                        struct acpi_device,
@@ -150,15 +136,13 @@ int __init acpi_wakeup_device_init(void)
                 /* In case user doesn't load button driver */
                 if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
                         continue;
-                spin_unlock(&acpi_device_lock);
                 acpi_set_gpe_type(dev->wakeup.gpe_device,
                                   dev->wakeup.gpe_number,
                                   ACPI_GPE_TYPE_WAKE_RUN);
                 acpi_enable_gpe(dev->wakeup.gpe_device,
                                 dev->wakeup.gpe_number);
                 dev->wakeup.state.enabled = 1;
-                spin_lock(&acpi_device_lock);
         }
-        spin_unlock(&acpi_device_lock);
+        mutex_unlock(&acpi_device_lock);
         return 0;
 }
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index 1a11de0d3e6d..fe7cf0188acc 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -273,7 +273,7 @@ static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf)
         union acpi_object *hkey = NULL;
         int i;
 
-        status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, 0,
+        status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
                                       &buffer);
         if (ACPI_FAILURE(status)) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,