Merge branch 'misc' into release

Conflicts:
	include/acpi/acpixf.h

Signed-off-by: Len Brown <len.brown@intel.com>

Documentation/kernel-parameters.txt

@@ -139,6 +139,7 @@ and is between 256 and 4096 characters. It is defined in the file
 			ht -- run only enough ACPI to enable Hyper Threading
 			strict -- Be less tolerant of platforms that are not
 				strictly ACPI specification compliant.
+			rsdt -- prefer RSDT over (default) XSDT
 
 			See also Documentation/power/pm.txt, pci=noacpi
 

arch/ia64/kernel/acpi.c

@@ -65,6 +65,7 @@ EXPORT_SYMBOL(pm_idle);
 void (*pm_power_off) (void);
 EXPORT_SYMBOL(pm_power_off);
 
+u32 acpi_rsdt_forced;
 unsigned int acpi_cpei_override;
 unsigned int acpi_cpei_phys_cpuid;
 

arch/x86/kernel/acpi/boot.c

@@ -47,7 +47,7 @@
 #endif
 
 static int __initdata acpi_force = 0;
-
+u32 acpi_rsdt_forced;
 #ifdef	CONFIG_ACPI
 int acpi_disabled = 0;
 #else
@@ -1794,6 +1794,10 @@ static int __init parse_acpi(char *arg)
 			disable_acpi();
 		acpi_ht = 1;
 	}
+	/* acpi=rsdt use RSDT instead of XSDT */
+	else if (strcmp(arg, "rsdt") == 0) {
+		acpi_rsdt_forced = 1;
+	}
 	/* "acpi=noirq" disables ACPI interrupt routing */
 	else if (strcmp(arg, "noirq") == 0) {
 		acpi_noirq_set();

arch/x86/kernel/acpi/cstate.c

@@ -56,6 +56,7 @@ static struct cstate_entry *cpu_cstate_entry;	/* per CPU ptr */
 static short mwait_supported[ACPI_PROCESSOR_MAX_POWER];
 
 #define MWAIT_SUBSTATE_MASK	(0xf)
+#define MWAIT_CSTATE_MASK	(0xf)
 #define MWAIT_SUBSTATE_SIZE	(4)
 
 #define CPUID_MWAIT_LEAF (5)
@@ -98,7 +99,8 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 	cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &edx);
 
 	/* Check whether this particular cx_type (in CST) is supported or not */
-	cstate_type = (cx->address >> MWAIT_SUBSTATE_SIZE) + 1;
+	cstate_type = ((cx->address >> MWAIT_SUBSTATE_SIZE) &
+			MWAIT_CSTATE_MASK) + 1;
 	edx_part = edx >> (cstate_type * MWAIT_SUBSTATE_SIZE);
 	num_cstate_subtype = edx_part & MWAIT_SUBSTATE_MASK;
 

drivers/acpi/acpica/tbutils.c

@@ -445,7 +445,8 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags)
 
 	/* Differentiate between RSDT and XSDT root tables */
 
-	if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
+	if (rsdp->revision > 1 && rsdp->xsdt_physical_address
+			&& !acpi_rsdt_forced) {
 		/*
 		 * Root table is an XSDT (64-bit physical addresses). We must use the
 		 * XSDT if the revision is > 1 and the XSDT pointer is present, as per

drivers/acpi/pci_link.c

@@ -796,10 +796,6 @@ static int irqrouter_resume(struct sys_device *dev)
 	struct list_head *node = NULL;
 	struct acpi_pci_link *link = NULL;
 
-
-	/* Make sure SCI is enabled again (Apple firmware bug?) */
-	acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
-
 	list_for_each(node, &acpi_link.entries) {
 		link = list_entry(node, struct acpi_pci_link, node);
 		if (!link) {

drivers/acpi/video.c

@@ -482,6 +482,7 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 	int status = AE_OK;
 	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 	struct acpi_object_list args = { 1, &arg0 };
+	int state;
 
 
 	arg0.integer.value = level;
@@ -490,6 +491,10 @@ acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 		status = acpi_evaluate_object(device->dev->handle, "_BCM",
 					      &args, NULL);
 	device->brightness->curr = level;
+	for (state = 2; state < device->brightness->count; state++)
+		if (level == device->brightness->levels[state])
+			device->backlight->props.brightness = state - 2;
+
 	return status;
 }
 

drivers/cpuidle/governors/menu.c

@@ -15,12 +15,14 @@
 #include <linux/tick.h>
 
 #define BREAK_FUZZ	4	/* 4 us */
+#define PRED_HISTORY_PCT	50
 
 struct menu_device {
 	int		last_state_idx;
 
 	unsigned int	expected_us;
 	unsigned int	predicted_us;
+	unsigned int    current_predicted_us;
 	unsigned int	last_measured_us;
 	unsigned int	elapsed_us;
 };
@@ -47,6 +49,12 @@ static int menu_select(struct cpuidle_device *dev)
 	data->expected_us =
 		(u32) ktime_to_ns(tick_nohz_get_sleep_length()) / 1000;
 
+	/* Recalculate predicted_us based on prediction_history_pct */
+	data->predicted_us *= PRED_HISTORY_PCT;
+	data->predicted_us += (100 - PRED_HISTORY_PCT) *
+				data->current_predicted_us;
+	data->predicted_us /= 100;
+
 	/* find the deepest idle state that satisfies our constraints */
 	for (i = CPUIDLE_DRIVER_STATE_START + 1; i < dev->state_count; i++) {
 		struct cpuidle_state *s = &dev->states[i];
@@ -97,7 +105,7 @@ static void menu_reflect(struct cpuidle_device *dev)
 		measured_us = -1;
 
 	/* Predict time until next break event */
-	data->predicted_us = max(measured_us, data->last_measured_us);
+	data->current_predicted_us = max(measured_us, data->last_measured_us);
 
 	if (last_idle_us + BREAK_FUZZ <
 	    data->expected_us - target->exit_latency) {

include/acpi/acpixf.h

@@ -70,6 +70,7 @@ extern u32 acpi_gbl_trace_flags;
 extern u32 acpi_current_gpe_count;
 extern struct acpi_table_fadt acpi_gbl_FADT;
 
+extern u32 acpi_rsdt_forced;
 /*
  * Global interfaces
  */