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

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (35 commits)
  PM idle: remove global declaration of pm_idle
  unicore32 idle: delete stray pm_idle comment
  openrisc idle: delete pm_idle
  mn10300 idle: delete pm_idle
  microblaze idle: delete pm_idle
  m32r idle: delete pm_idle, and other dead idle code
  ia64 idle: delete pm_idle
  cris idle: delete idle and pm_idle
  ARM64 idle: delete pm_idle
  ARM idle: delete pm_idle
  blackfin idle: delete pm_idle
  sparc idle: rename pm_idle to sparc_idle
  sh idle: rename global pm_idle to static sh_idle
  x86 idle: rename global pm_idle to static x86_idle
  APM idle: register apm_cpu_idle via cpuidle
  tools/power turbostat: display SMI count by default
  intel_idle: export both C1 and C1E
  cpuidle: remove vestage definition of cpuidle_state_usage.driver_data
  x86 idle: remove 32-bit-only "no-hlt" parameter, hlt_works_ok flag
  x86 idle: remove mwait_idle() and "idle=mwait" cmdline param
  ...

Conflicts:
	arch/x86/kernel/process.c (with PM / tracing commit 43720bd)
	drivers/acpi/processor_idle.c (with ACPICA commit 4f84291)

5 files changed, 52 insertions, 152 deletions

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index d65464e..9f4bc6a 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -232,6 +232,7 @@
 #include <linux/acpi.h>
 #include <linux/syscore_ops.h>
 #include <linux/i8253.h>
+#include <linux/cpuidle.h>
 
 #include <asm/uaccess.h>
 #include <asm/desc.h>
@@ -360,13 +361,35 @@ struct apm_user {
  * idle percentage above which bios idle calls are done
  */
 #ifdef CONFIG_APM_CPU_IDLE
-#warning deprecated CONFIG_APM_CPU_IDLE will be deleted in 2012
 #define DEFAULT_IDLE_THRESHOLD	95
 #else
 #define DEFAULT_IDLE_THRESHOLD	100
 #endif
 #define DEFAULT_IDLE_PERIOD	(100 / 3)
 
+static int apm_cpu_idle(struct cpuidle_device *dev,
+			struct cpuidle_driver *drv, int index);
+
+static struct cpuidle_driver apm_idle_driver = {
+	.name = "apm_idle",
+	.owner = THIS_MODULE,
+	.en_core_tk_irqen = 1,
+	.states = {
+		{ /* entry 0 is for polling */ },
+		{ /* entry 1 is for APM idle */
+			.name = "APM",
+			.desc = "APM idle",
+			.flags = CPUIDLE_FLAG_TIME_VALID,
+			.exit_latency = 250,	/* WAG */
+			.target_residency = 500,	/* WAG */
+			.enter = &apm_cpu_idle
+		},
+	},
+	.state_count = 2,
+};
+
+static struct cpuidle_device apm_cpuidle_device;
+
 /*
  * Local variables
  */
@@ -377,7 +400,6 @@ static struct {
 static int clock_slowed;
 static int idle_threshold __read_mostly = DEFAULT_IDLE_THRESHOLD;
 static int idle_period __read_mostly = DEFAULT_IDLE_PERIOD;
-static int set_pm_idle;
 static int suspends_pending;
 static int standbys_pending;
 static int ignore_sys_suspend;
@@ -884,8 +906,6 @@ static void apm_do_busy(void)
 #define IDLE_CALC_LIMIT	(HZ * 100)
 #define IDLE_LEAKY_MAX	16
 
-static void (*original_pm_idle)(void) __read_mostly;
-
 /**
  * apm_cpu_idle		-	cpu idling for APM capable Linux
  *
@@ -894,7 +914,8 @@ static void (*original_pm_idle)(void) __read_mostly;
  * Furthermore it calls the system default idle routine.
  */
 
-static void apm_cpu_idle(void)
+static int apm_cpu_idle(struct cpuidle_device *dev,
+	struct cpuidle_driver *drv, int index)
 {
 	static int use_apm_idle; /* = 0 */
 	static unsigned int last_jiffies; /* = 0 */
@@ -904,7 +925,6 @@ static void apm_cpu_idle(void)
 	unsigned int jiffies_since_last_check = jiffies - last_jiffies;
 	unsigned int bucket;
 
-	WARN_ONCE(1, "deprecated apm_cpu_idle will be deleted in 2012");
 recalc:
 	if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
 		use_apm_idle = 0;
@@ -950,10 +970,7 @@ recalc:
 				break;
 			}
 		}
-		if (original_pm_idle)
-			original_pm_idle();
-		else
-			default_idle();
+		default_idle();
 		local_irq_disable();
 		jiffies_since_last_check = jiffies - last_jiffies;
 		if (jiffies_since_last_check > idle_period)
@@ -963,7 +980,7 @@ recalc:
 	if (apm_idle_done)
 		apm_do_busy();
 
-	local_irq_enable();
+	return index;
 }
 
 /**
@@ -2381,9 +2398,9 @@ static int __init apm_init(void)
 	if (HZ != 100)
 		idle_period = (idle_period * HZ) / 100;
 	if (idle_threshold < 100) {
-		original_pm_idle = pm_idle;
-		pm_idle  = apm_cpu_idle;
-		set_pm_idle = 1;
+		if (!cpuidle_register_driver(&apm_idle_driver))
+			if (cpuidle_register_device(&apm_cpuidle_device))
+				cpuidle_unregister_driver(&apm_idle_driver);
 	}
 
 	return 0;
@@ -2393,15 +2410,9 @@ static void __exit apm_exit(void)
 {
 	int error;
 
-	if (set_pm_idle) {
-		pm_idle = original_pm_idle;
-		/*
-		 * We are about to unload the current idle thread pm callback
-		 * (pm_idle), Wait for all processors to update cached/local
-		 * copies of pm_idle before proceeding.
-		 */
-		kick_all_cpus_sync();
-	}
+	cpuidle_unregister_device(&apm_cpuidle_device);
+	cpuidle_unregister_driver(&apm_idle_driver);
+
 	if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
 	    && (apm_info.connection_version > 0x0100)) {
 		error = apm_engage_power_management(APM_DEVICE_ALL, 0);
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 92dfec9..af6455e 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -17,15 +17,6 @@
 #include <asm/paravirt.h>
 #include <asm/alternative.h>
 
-static int __init no_halt(char *s)
-{
-	WARN_ONCE(1, "\"no-hlt\" is deprecated, please use \"idle=poll\"\n");
-	boot_cpu_data.hlt_works_ok = 0;
-	return 1;
-}
-
-__setup("no-hlt", no_halt);
-
 static int __init no_387(char *s)
 {
 	boot_cpu_data.hard_math = 0;
@@ -89,23 +80,6 @@ static void __init check_fpu(void)
 		pr_warn("Hmm, FPU with FDIV bug\n");
 }
 
-static void __init check_hlt(void)
-{
-	if (boot_cpu_data.x86 >= 5 || paravirt_enabled())
-		return;
-
-	pr_info("Checking 'hlt' instruction... ");
-	if (!boot_cpu_data.hlt_works_ok) {
-		pr_cont("disabled\n");
-		return;
-	}
-	halt();
-	halt();
-	halt();
-	halt();
-	pr_cont("OK\n");
-}
-
 /*
  * Check whether we are able to run this kernel safely on SMP.
  *
@@ -129,7 +103,6 @@ void __init check_bugs(void)
 	print_cpu_info(&boot_cpu_data);
 #endif
 	check_config();
-	check_hlt();
 	init_utsname()->machine[1] =
 		'0' + (boot_cpu_data.x86 > 6 ? 6 : boot_cpu_data.x86);
 	alternative_instructions();
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index 3286a92..e280253 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -28,7 +28,6 @@ static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
 {
 	seq_printf(m,
 		   "fdiv_bug\t: %s\n"
-		   "hlt_bug\t\t: %s\n"
 		   "f00f_bug\t: %s\n"
 		   "coma_bug\t: %s\n"
 		   "fpu\t\t: %s\n"
@@ -36,7 +35,6 @@ static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
 		   "cpuid level\t: %d\n"
 		   "wp\t\t: %s\n",
 		   c->fdiv_bug ? "yes" : "no",
-		   c->hlt_works_ok ? "no" : "yes",
 		   c->f00f_bug ? "yes" : "no",
 		   c->coma_bug ? "yes" : "no",
 		   c->hard_math ? "yes" : "no",
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index dcfc1f4..14ae100 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -268,13 +268,7 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
 unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE;
 EXPORT_SYMBOL(boot_option_idle_override);
 
-/*
- * Powermanagement idle function, if any..
- */
-void (*pm_idle)(void);
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(pm_idle);
-#endif
+static void (*x86_idle)(void);
 
 #ifndef CONFIG_SMP
 static inline void play_dead(void)
@@ -351,7 +345,7 @@ void cpu_idle(void)
 			rcu_idle_enter();
 
 			if (cpuidle_idle_call())
-				pm_idle();
+				x86_idle();
 
 			rcu_idle_exit();
 			start_critical_timings();
@@ -394,14 +388,16 @@ void default_idle(void)
 EXPORT_SYMBOL(default_idle);
 #endif
 
-bool set_pm_idle_to_default(void)
+#ifdef CONFIG_XEN
+bool xen_set_default_idle(void)
 {
-	bool ret = !!pm_idle;
+	bool ret = !!x86_idle;
 
-	pm_idle = default_idle;
+	x86_idle = default_idle;
 
 	return ret;
 }
+#endif
 void stop_this_cpu(void *dummy)
 {
 	local_irq_disable();
@@ -411,29 +407,8 @@ void stop_this_cpu(void *dummy)
 	set_cpu_online(smp_processor_id(), false);
 	disable_local_APIC();
 
-	for (;;) {
-		if (hlt_works(smp_processor_id()))
-			halt();
-	}
-}
-
-/* Default MONITOR/MWAIT with no hints, used for default C1 state */
-static void mwait_idle(void)
-{
-	if (!need_resched()) {
-		trace_cpu_idle_rcuidle(1, smp_processor_id());
-		if (this_cpu_has(X86_FEATURE_CLFLUSH_MONITOR))
-			clflush((void *)&current_thread_info()->flags);
-
-		__monitor((void *)&current_thread_info()->flags, 0, 0);
-		smp_mb();
-		if (!need_resched())
-			__sti_mwait(0, 0);
-		else
-			local_irq_enable();
-		trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
-	} else
-		local_irq_enable();
+	for (;;)
+		halt();
 }
 
 /*
@@ -450,53 +425,6 @@ static void poll_idle(void)
 	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 }
 
-/*
- * mwait selection logic:
- *
- * It depends on the CPU. For AMD CPUs that support MWAIT this is
- * wrong. Family 0x10 and 0x11 CPUs will enter C1 on HLT. Powersavings
- * then depend on a clock divisor and current Pstate of the core. If
- * all cores of a processor are in halt state (C1) the processor can
- * enter the C1E (C1 enhanced) state. If mwait is used this will never
- * happen.
- *
- * idle=mwait overrides this decision and forces the usage of mwait.
- */
-
-#define MWAIT_INFO			0x05
-#define MWAIT_ECX_EXTENDED_INFO		0x01
-#define MWAIT_EDX_C1			0xf0
-
-int mwait_usable(const struct cpuinfo_x86 *c)
-{
-	u32 eax, ebx, ecx, edx;
-
-	/* Use mwait if idle=mwait boot option is given */
-	if (boot_option_idle_override == IDLE_FORCE_MWAIT)
-		return 1;
-
-	/*
-	 * Any idle= boot option other than idle=mwait means that we must not
-	 * use mwait. Eg: idle=halt or idle=poll or idle=nomwait
-	 */
-	if (boot_option_idle_override != IDLE_NO_OVERRIDE)
-		return 0;
-
-	if (c->cpuid_level < MWAIT_INFO)
-		return 0;
-
-	cpuid(MWAIT_INFO, &eax, &ebx, &ecx, &edx);
-	/* Check, whether EDX has extended info about MWAIT */
-	if (!(ecx & MWAIT_ECX_EXTENDED_INFO))
-		return 1;
-
-	/*
-	 * edx enumeratios MONITOR/MWAIT extensions. Check, whether
-	 * C1  supports MWAIT
-	 */
-	return (edx & MWAIT_EDX_C1);
-}
-
 bool amd_e400_c1e_detected;
 EXPORT_SYMBOL(amd_e400_c1e_detected);
 
@@ -561,31 +489,24 @@ static void amd_e400_idle(void)
 void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
-	if (pm_idle == poll_idle && smp_num_siblings > 1) {
+	if (x86_idle == poll_idle && smp_num_siblings > 1)
 		pr_warn_once("WARNING: polling idle and HT enabled, performance may degrade\n");
-	}
 #endif
-	if (pm_idle)
+	if (x86_idle)
 		return;
 
-	if (cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)) {
-		/*
-		 * One CPU supports mwait => All CPUs supports mwait
-		 */
-		pr_info("using mwait in idle threads\n");
-		pm_idle = mwait_idle;
-	} else if (cpu_has_amd_erratum(amd_erratum_400)) {
+	if (cpu_has_amd_erratum(amd_erratum_400)) {
 		/* E400: APIC timer interrupt does not wake up CPU from C1e */
 		pr_info("using AMD E400 aware idle routine\n");
-		pm_idle = amd_e400_idle;
+		x86_idle = amd_e400_idle;
 	} else
-		pm_idle = default_idle;
+		x86_idle = default_idle;
 }
 
 void __init init_amd_e400_c1e_mask(void)
 {
 	/* If we're using amd_e400_idle, we need to allocate amd_e400_c1e_mask. */
-	if (pm_idle == amd_e400_idle)
+	if (x86_idle == amd_e400_idle)
 		zalloc_cpumask_var(&amd_e400_c1e_mask, GFP_KERNEL);
 }
 
@@ -596,11 +517,8 @@ static int __init idle_setup(char *str)
 
 	if (!strcmp(str, "poll")) {
 		pr_info("using polling idle threads\n");
-		pm_idle = poll_idle;
+		x86_idle = poll_idle;
 		boot_option_idle_override = IDLE_POLL;
-	} else if (!strcmp(str, "mwait")) {
-		boot_option_idle_override = IDLE_FORCE_MWAIT;
-		WARN_ONCE(1, "\"idle=mwait\" will be removed in 2012\n");
 	} else if (!strcmp(str, "halt")) {
 		/*
 		 * When the boot option of idle=halt is added, halt is
@@ -609,7 +527,7 @@ static int __init idle_setup(char *str)
 		 * To continue to load the CPU idle driver, don't touch
 		 * the boot_option_idle_override.
 		 */
-		pm_idle = default_idle;
+		x86_idle = default_idle;
 		boot_option_idle_override = IDLE_HALT;
 	} else if (!strcmp(str, "nomwait")) {
 		/*
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index ed0fe38..a6ceaed 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1369,7 +1369,7 @@ static inline void mwait_play_dead(void)
 	void *mwait_ptr;
 	struct cpuinfo_x86 *c = __this_cpu_ptr(&cpu_info);
 
-	if (!(this_cpu_has(X86_FEATURE_MWAIT) && mwait_usable(c)))
+	if (!this_cpu_has(X86_FEATURE_MWAIT))
 		return;
 	if (!this_cpu_has(X86_FEATURE_CLFLSH))
 		return;