Merge branch 'linus' into x86/tracehook

Conflicts:
	arch/x86/Kconfig

Signed-off-by: Ingo Molnar <mingo@elte.hu>

5 files changed, 39 insertions, 30 deletions

diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index 44ad90c03c2..d3d0886d637 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -78,9 +78,9 @@ MODULE_LICENSE("GPL");
 static uid_t asus_uid;
 static gid_t asus_gid;
 module_param(asus_uid, uint, 0);
-MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
+MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
 module_param(asus_gid, uint, 0);
-MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
+MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
 
 /* For each model, all features implemented, 
  * those marked with R are relative to HOTK, A for absolute */
diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c
index dd376f7ad09..d5b4ef89887 100644
--- a/drivers/acpi/pci_slot.c
+++ b/drivers/acpi/pci_slot.c
@@ -76,9 +76,9 @@ static struct acpi_pci_driver acpi_pci_slot_driver = {
 };
 
 static int
-check_slot(acpi_handle handle, int *device, unsigned long *sun)
+check_slot(acpi_handle handle, unsigned long *sun)
 {
-	int retval = 0;
+	int device = -1;
 	unsigned long adr, sta;
 	acpi_status status;
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -89,32 +89,27 @@ check_slot(acpi_handle handle, int *device, unsigned long *sun)
 	if (check_sta_before_sun) {
 		/* If SxFy doesn't have _STA, we just assume it's there */
 		status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-		if (ACPI_SUCCESS(status) && !(sta & ACPI_STA_DEVICE_PRESENT)) {
-			retval = -1;
+		if (ACPI_SUCCESS(status) && !(sta & ACPI_STA_DEVICE_PRESENT))
 			goto out;
-		}
 	}
 
 	status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
 	if (ACPI_FAILURE(status)) {
 		dbg("_ADR returned %d on %s\n", status, (char *)buffer.pointer);
-		retval = -1;
 		goto out;
 	}
 
-	*device = (adr >> 16) & 0xffff;
-
 	/* No _SUN == not a slot == bail */
 	status = acpi_evaluate_integer(handle, "_SUN", NULL, sun);
 	if (ACPI_FAILURE(status)) {
 		dbg("_SUN returned %d on %s\n", status, (char *)buffer.pointer);
-		retval = -1;
 		goto out;
 	}
 
+	device = (adr >> 16) & 0xffff;
 out:
 	kfree(buffer.pointer);
-	return retval;
+	return device;
 }
 
 struct callback_args {
@@ -144,7 +139,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 	struct callback_args *parent_context = context;
 	struct pci_bus *pci_bus = parent_context->pci_bus;
 
-	if (check_slot(handle, &device, &sun))
+	device = check_slot(handle, &sun);
+	if (device < 0)
 		return AE_OK;
 
 	slot = kmalloc(sizeof(*slot), GFP_KERNEL);
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index b7f2963693a..283c08f5f4d 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1332,9 +1332,15 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr)
 	if (!pr->flags.power_setup_done)
 		return -ENODEV;
 
-	/* Fall back to the default idle loop */
-	pm_idle = pm_idle_save;
-	synchronize_sched();	/* Relies on interrupts forcing exit from idle. */
+	/*
+	 * Fall back to the default idle loop, when pm_idle_save had
+	 * been initialized.
+	 */
+	if (pm_idle_save) {
+		pm_idle = pm_idle_save;
+		/* Relies on interrupts forcing exit from idle. */
+		synchronize_sched();
+	}
 
 	pr->flags.power = 0;
 	result = acpi_processor_get_power_info(pr);
@@ -1896,7 +1902,8 @@ int acpi_processor_power_exit(struct acpi_processor *pr,
 
 	/* Unregister the idle handler when processor #0 is removed. */
 	if (pr->id == 0) {
-		pm_idle = pm_idle_save;
+		if (pm_idle_save)
+			pm_idle = pm_idle_save;
 
 		/*
 		 * We are about to unload the current idle thread pm callback
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index b4749969c6b..0133af49cf0 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -64,7 +64,13 @@ static DEFINE_MUTEX(performance_mutex);
  * policy is adjusted accordingly.
  */
 
-static unsigned int ignore_ppc = 0;
+/* ignore_ppc:
+ * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
+ *       ignore _PPC
+ *  0 -> cpufreq low level drivers initialized -> consider _PPC values
+ *  1 -> ignore _PPC totally -> forced by user through boot param
+ */
+static unsigned int ignore_ppc = -1;
 module_param(ignore_ppc, uint, 0644);
 MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
 		 "limited by BIOS, this should help");
@@ -72,7 +78,7 @@ MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
 #define PPC_REGISTERED   1
 #define PPC_IN_USE       2
 
-static int acpi_processor_ppc_status = 0;
+static int acpi_processor_ppc_status;
 
 static int acpi_processor_ppc_notifier(struct notifier_block *nb,
 				       unsigned long event, void *data)
@@ -81,13 +87,18 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
 	struct acpi_processor *pr;
 	unsigned int ppc = 0;
 
-	if (ignore_ppc)
+	if (event == CPUFREQ_START && ignore_ppc <= 0) {
+		ignore_ppc = 0;
 		return 0;
+	}
 
-	mutex_lock(&performance_mutex);
+	if (ignore_ppc)
+		return 0;
 
 	if (event != CPUFREQ_INCOMPATIBLE)
-		goto out;
+		return 0;
+
+	mutex_lock(&performance_mutex);
 
 	pr = per_cpu(processors, policy->cpu);
 	if (!pr || !pr->performance)
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index a2c3f9cfa54..a56fc6c4394 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -827,7 +827,6 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
 static int acpi_processor_get_throttling(struct acpi_processor *pr)
 {
 	cpumask_t saved_mask;
-	cpumask_of_cpu_ptr_declare(new_mask);
 	int ret;
 
 	if (!pr)
@@ -839,8 +838,7 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
 	 * Migrate task to the cpu pointed by pr.
 	 */
 	saved_mask = current->cpus_allowed;
-	cpumask_of_cpu_ptr_next(new_mask, pr->id);
-	set_cpus_allowed_ptr(current, new_mask);
+	set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
 	ret = pr->throttling.acpi_processor_get_throttling(pr);
 	/* restore the previous state */
 	set_cpus_allowed_ptr(current, &saved_mask);
@@ -989,7 +987,6 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
 int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 {
 	cpumask_t saved_mask;
-	cpumask_of_cpu_ptr_declare(new_mask);
 	int ret = 0;
 	unsigned int i;
 	struct acpi_processor *match_pr;
@@ -1028,8 +1025,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 	 * it can be called only for the cpu pointed by pr.
 	 */
 	if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
-		cpumask_of_cpu_ptr_next(new_mask, pr->id);
-		set_cpus_allowed_ptr(current, new_mask);
+		set_cpus_allowed_ptr(current, &cpumask_of_cpu(pr->id));
 		ret = p_throttling->acpi_processor_set_throttling(pr,
 						t_state.target_state);
 	} else {
@@ -1060,8 +1056,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 				continue;
 			}
 			t_state.cpu = i;
-			cpumask_of_cpu_ptr_next(new_mask, i);
-			set_cpus_allowed_ptr(current, new_mask);
+			set_cpus_allowed_ptr(current, &cpumask_of_cpu(i));
 			ret = match_pr->throttling.
 				acpi_processor_set_throttling(
 				match_pr, t_state.target_state);