Merge branches 'release', 'APERF', 'ARAT', 'misc', 'kelvin', 'device-lock' and 'bjorn.notify' into release

Author: lenb

arch/x86/include/asm/cpufeature.h

@@ -154,6 +154,7 @@
  * CPUID levels like 0x6, 0xA etc
  */
 #define X86_FEATURE_IDA		(7*32+ 0) /* Intel Dynamic Acceleration */
+#define X86_FEATURE_ARAT	(7*32+ 1) /* Always Running APIC Timer */
 
 /* Virtualization flags: Linux defined */
 #define X86_FEATURE_TPR_SHADOW  (8*32+ 0) /* Intel TPR Shadow */

arch/x86/kernel/apic/apic.c

@@ -431,6 +431,12 @@ static void __cpuinit setup_APIC_timer(void)
 {
 	struct clock_event_device *levt = &__get_cpu_var(lapic_events);
 
+	if (cpu_has(&current_cpu_data, X86_FEATURE_ARAT)) {
+		lapic_clockevent.features &= ~CLOCK_EVT_FEAT_C3STOP;
+		/* Make LAPIC timer preferrable over percpu HPET */
+		lapic_clockevent.rating = 150;
+	}
+
 	memcpy(levt, &lapic_clockevent, sizeof(*levt));
 	levt->cpumask = cpumask_of(smp_processor_id());
 

arch/x86/kernel/cpu/addon_cpuid_features.c

@@ -31,6 +31,7 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
 
 	static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
 		{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 },
+		{ X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 },
 		{ 0, 0, 0, 0 }
 	};
 

arch/x86/kernel/cpu/cpufreq/longhaul.c

@@ -33,7 +33,6 @@
 #include <linux/timex.h>
 #include <linux/io.h>
 #include <linux/acpi.h>
-#include <linux/kernel.h>
 
 #include <asm/msr.h>
 #include <acpi/processor.h>

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},

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;

drivers/acpi/proc.c

@@ -343,25 +343,21 @@ 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)
 {
 	struct list_head *node, *next;
 
 	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);
 		struct device *ldev;
 
 		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;
 }
 

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

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);
 

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;