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

Pull ACPI & Power Management changes from Len Brown:
 - ACPI 5.0 after-ripples, ACPICA/Linux divergence cleanup
 - cpuidle evolving, more ARM use
 - thermal sub-system evolving, ditto
 - assorted other PM bits

Fix up conflicts in various cpuidle implementations due to ARM cpuidle
cleanups (ARM at91 self-refresh and cpu idle code rewritten into
"standby" in asm conflicting with the consolidation of cpuidle time
keeping), trivial SH include file context conflict and RCU tracing fixes
in generic code.

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (77 commits)
  ACPI throttling: fix endian bug in acpi_read_throttling_status()
  Disable MCP limit exceeded messages from Intel IPS driver
  ACPI video: Don't start video device until its associated input device has been allocated
  ACPI video: Harden video bus adding.
  ACPI: Add support for exposing BGRT data
  ACPI: export acpi_kobj
  ACPI: Fix logic for removing mappings in 'acpi_unmap'
  CPER failed to handle generic error records with multiple sections
  ACPI: Clean redundant codes in scan.c
  ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
  ACPI: consistently use should_use_kmap()
  PNPACPI: Fix device ref leaking in acpi_pnp_match
  ACPI: Fix use-after-free in acpi_map_lsapic
  ACPI: processor_driver: add missing kfree
  ACPI, APEI: Fix incorrect APEI register bit width check and usage
  Update documentation for parameter *notrigger* in einj.txt
  ACPI, APEI, EINJ, new parameter to control trigger action
  ACPI, APEI, EINJ, limit the range of einj_param
  ACPI, APEI, Fix ERST header length check
  cpuidle: power_usage should be declared signed integer
  ...

9 files changed, 152 insertions, 208 deletions

diff --git a/arch/arm/include/asm/cpuidle.h b/arch/arm/include/asm/cpuidle.h
new file mode 100644
index 000000000000..2fca60ab513a
--- /dev/null
+++ b/arch/arm/include/asm/cpuidle.h
@@ -0,0 +1,29 @@
+#ifndef __ASM_ARM_CPUIDLE_H
+#define __ASM_ARM_CPUIDLE_H
+
+#ifdef CONFIG_CPU_IDLE
+extern int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
+                struct cpuidle_driver *drv, int index);
+#else
+static inline int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
+                struct cpuidle_driver *drv, int index) { return -ENODEV; }
+#endif
+
+/* Common ARM WFI state */
+#define ARM_CPUIDLE_WFI_STATE_PWR(p) {\
+        .enter                  = arm_cpuidle_simple_enter,\
+        .exit_latency           = 1,\
+        .target_residency       = 1,\
+        .power_usage            = p,\
+        .flags                  = CPUIDLE_FLAG_TIME_VALID,\
+        .name                   = "WFI",\
+        .desc                   = "ARM WFI",\
+}
+
+/*
+ * in case power_specified == 1, give a default WFI power value needed
+ * by some governors
+ */
+#define ARM_CPUIDLE_WFI_STATE ARM_CPUIDLE_WFI_STATE_PWR(UINT_MAX)
+
+#endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 8269d8928742..7b787d642af4 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -23,7 +23,7 @@ obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += compat.o
 
 obj-$(CONFIG_LEDS)              += leds.o
 obj-$(CONFIG_OC_ETM)            += etm.o
-
+obj-$(CONFIG_CPU_IDLE)          += cpuidle.o
 obj-$(CONFIG_ISA_DMA_API)       += dma.o
 obj-$(CONFIG_FIQ)               += fiq.o fiqasm.o
 obj-$(CONFIG_MODULES)           += armksyms.o module.o
diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c
new file mode 100644
index 000000000000..89545f6c8403
--- /dev/null
+++ b/arch/arm/kernel/cpuidle.c
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/cpuidle.h>
+#include <asm/proc-fns.h>
+
+int arm_cpuidle_simple_enter(struct cpuidle_device *dev,
+                struct cpuidle_driver *drv, int index)
+{
+        cpu_do_idle();
+
+        return index;
+}
diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index 555d956b3a57..ece1f9aefb47 100644
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -17,9 +17,10 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/cpuidle.h>
-#include <asm/proc-fns.h>
 #include <linux/io.h>
 #include <linux/export.h>
+#include <asm/proc-fns.h>
+#include <asm/cpuidle.h>
 
 #include "pm.h"
 
@@ -27,61 +28,39 @@
 
 static DEFINE_PER_CPU(struct cpuidle_device, at91_cpuidle_device);
 
-static struct cpuidle_driver at91_idle_driver = {
-        .name =         "at91_idle",
-        .owner =        THIS_MODULE,
-};
-
 /* Actual code that puts the SoC in different idle states */
 static int at91_enter_idle(struct cpuidle_device *dev,
                         struct cpuidle_driver *drv,
                                int index)
 {
-        struct timeval before, after;
-        int idle_time;
-
-        local_irq_disable();
-        do_gettimeofday(&before);
-        if (index == 0)
-                /* Wait for interrupt state */
-                cpu_do_idle();
-        else if (index == 1)
-                at91_standby();
+        at91_standby();
 
-        do_gettimeofday(&after);
-        local_irq_enable();
-        idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
-                        (after.tv_usec - before.tv_usec);
-
-        dev->last_residency = idle_time;
         return index;
 }
 
+static struct cpuidle_driver at91_idle_driver = {
+        .name                   = "at91_idle",
+        .owner                  = THIS_MODULE,
+        .en_core_tk_irqen       = 1,
+        .states[0]              = ARM_CPUIDLE_WFI_STATE,
+        .states[1]              = {
+                .enter                  = at91_enter_idle,
+                .exit_latency           = 10,
+                .target_residency       = 100000,
+                .flags                  = CPUIDLE_FLAG_TIME_VALID,
+                .name                   = "RAM_SR",
+                .desc                   = "WFI and DDR Self Refresh",
+        },
+        .state_count = AT91_MAX_STATES,
+};
+
 /* Initialize CPU idle by registering the idle states */
 static int at91_init_cpuidle(void)
 {
         struct cpuidle_device *device;
-        struct cpuidle_driver *driver = &at91_idle_driver;
 
         device = &per_cpu(at91_cpuidle_device, smp_processor_id());
         device->state_count = AT91_MAX_STATES;
-        driver->state_count = AT91_MAX_STATES;
-
-        /* Wait for interrupt state */
-        driver->states[0].enter = at91_enter_idle;
-        driver->states[0].exit_latency = 1;
-        driver->states[0].target_residency = 10000;
-        driver->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[0].name, "WFI");
-        strcpy(driver->states[0].desc, "Wait for interrupt");
-
-        /* Wait for interrupt and RAM self refresh state */
-        driver->states[1].enter = at91_enter_idle;
-        driver->states[1].exit_latency = 10;
-        driver->states[1].target_residency = 10000;
-        driver->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[1].name, "RAM_SR");
-        strcpy(driver->states[1].desc, "WFI and RAM Self Refresh");
 
         cpuidle_register_driver(&at91_idle_driver);
 
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index a30c7c5a6d83..9107691adbdb 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -18,6 +18,7 @@
 #include <linux/io.h>
 #include <linux/export.h>
 #include <asm/proc-fns.h>
+#include <asm/cpuidle.h>
 
 #include <mach/cpuidle.h>
 #include <mach/ddr2.h>
@@ -30,12 +31,43 @@ struct davinci_ops {
         u32 flags;
 };
 
+/* Actual code that puts the SoC in different idle states */
+static int davinci_enter_idle(struct cpuidle_device *dev,
+                                struct cpuidle_driver *drv,
+                                                int index)
+{
+        struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
+        struct davinci_ops *ops = cpuidle_get_statedata(state_usage);
+
+        if (ops && ops->enter)
+                ops->enter(ops->flags);
+
+        index = cpuidle_wrap_enter(dev, drv, index,
+                                arm_cpuidle_simple_enter);
+
+        if (ops && ops->exit)
+                ops->exit(ops->flags);
+
+        return index;
+}
+
 /* fields in davinci_ops.flags */
 #define DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN BIT(0)
 
 static struct cpuidle_driver davinci_idle_driver = {
-        .name   = "cpuidle-davinci",
-        .owner  = THIS_MODULE,
+        .name                   = "cpuidle-davinci",
+        .owner                  = THIS_MODULE,
+        .en_core_tk_irqen       = 1,
+        .states[0]              = ARM_CPUIDLE_WFI_STATE,
+        .states[1]              = {
+                .enter                  = davinci_enter_idle,
+                .exit_latency           = 10,
+                .target_residency       = 100000,
+                .flags                  = CPUIDLE_FLAG_TIME_VALID,
+                .name                   = "DDR SR",
+                .desc                   = "WFI and DDR Self Refresh",
+        },
+        .state_count = DAVINCI_CPUIDLE_MAX_STATES,
 };
 
 static DEFINE_PER_CPU(struct cpuidle_device, davinci_cpuidle_device);
@@ -77,41 +109,10 @@ static struct davinci_ops davinci_states[DAVINCI_CPUIDLE_MAX_STATES] = {
         },
 };
 
-/* Actual code that puts the SoC in different idle states */
-static int davinci_enter_idle(struct cpuidle_device *dev,
-                                struct cpuidle_driver *drv,
-                                                int index)
-{
-        struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
-        struct davinci_ops *ops = cpuidle_get_statedata(state_usage);
-        struct timeval before, after;
-        int idle_time;
-
-        local_irq_disable();
-        do_gettimeofday(&before);
-
-        if (ops && ops->enter)
-                ops->enter(ops->flags);
-        /* Wait for interrupt state */
-        cpu_do_idle();
-        if (ops && ops->exit)
-                ops->exit(ops->flags);
-
-        do_gettimeofday(&after);
-        local_irq_enable();
-        idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
-                        (after.tv_usec - before.tv_usec);
-
-        dev->last_residency = idle_time;
-
-        return index;
-}
-
 static int __init davinci_cpuidle_probe(struct platform_device *pdev)
 {
         int ret;
         struct cpuidle_device *device;
-        struct cpuidle_driver *driver = &davinci_idle_driver;
         struct davinci_cpuidle_config *pdata = pdev->dev.platform_data;
 
         device = &per_cpu(davinci_cpuidle_device, smp_processor_id());
@@ -123,27 +124,11 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev)
 
         ddr2_reg_base = pdata->ddr2_ctlr_base;
 
-        /* Wait for interrupt state */
-        driver->states[0].enter = davinci_enter_idle;
-        driver->states[0].exit_latency = 1;
-        driver->states[0].target_residency = 10000;
-        driver->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[0].name, "WFI");
-        strcpy(driver->states[0].desc, "Wait for interrupt");
-
-        /* Wait for interrupt and DDR self refresh state */
-        driver->states[1].enter = davinci_enter_idle;
-        driver->states[1].exit_latency = 10;
-        driver->states[1].target_residency = 10000;
-        driver->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[1].name, "DDR SR");
-        strcpy(driver->states[1].desc, "WFI and DDR Self Refresh");
         if (pdata->ddr2_pdown)
                 davinci_states[1].flags |= DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN;
         cpuidle_set_statedata(&device->states_usage[1], &davinci_states[1]);
 
         device->state_count = DAVINCI_CPUIDLE_MAX_STATES;
-        driver->state_count = DAVINCI_CPUIDLE_MAX_STATES;
 
         ret = cpuidle_register_driver(&davinci_idle_driver);
         if (ret) {
diff --git a/arch/arm/mach-kirkwood/cpuidle.c b/arch/arm/mach-kirkwood/cpuidle.c
index 7088180b018b..0f1710941878 100644
--- a/arch/arm/mach-kirkwood/cpuidle.c
+++ b/arch/arm/mach-kirkwood/cpuidle.c
@@ -20,77 +20,47 @@
 #include <linux/io.h>
 #include <linux/export.h>
 #include <asm/proc-fns.h>
+#include <asm/cpuidle.h>
 #include <mach/kirkwood.h>
 
 #define KIRKWOOD_MAX_STATES     2
 
-static struct cpuidle_driver kirkwood_idle_driver = {
-        .name =         "kirkwood_idle",
-        .owner =        THIS_MODULE,
-};
-
-static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device);
-
 /* Actual code that puts the SoC in different idle states */
 static int kirkwood_enter_idle(struct cpuidle_device *dev,
                                 struct cpuidle_driver *drv,
                                int index)
 {
-        struct timeval before, after;
-        int idle_time;
-
-        local_irq_disable();
-        do_gettimeofday(&before);
-        if (index == 0)
-                /* Wait for interrupt state */
-                cpu_do_idle();
-        else if (index == 1) {
-                /*
-                 * Following write will put DDR in self refresh.
-                 * Note that we have 256 cycles before DDR puts it
-                 * self in self-refresh, so the wait-for-interrupt
-                 * call afterwards won't get the DDR from self refresh
-                 * mode.
-                 */
-                writel(0x7, DDR_OPERATION_BASE);
-                cpu_do_idle();
-        }
-        do_gettimeofday(&after);
-        local_irq_enable();
-        idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC +
-                        (after.tv_usec - before.tv_usec);
-
-        /* Update last residency */
-        dev->last_residency = idle_time;
+        writel(0x7, DDR_OPERATION_BASE);
+        cpu_do_idle();
 
         return index;
 }
 
+static struct cpuidle_driver kirkwood_idle_driver = {
+        .name                   = "kirkwood_idle",
+        .owner                  = THIS_MODULE,
+        .en_core_tk_irqen       = 1,
+        .states[0]              = ARM_CPUIDLE_WFI_STATE,
+        .states[1]              = {
+                .enter                  = kirkwood_enter_idle,
+                .exit_latency           = 10,
+                .target_residency       = 100000,
+                .flags                  = CPUIDLE_FLAG_TIME_VALID,
+                .name                   = "DDR SR",
+                .desc                   = "WFI and DDR Self Refresh",
+        },
+        .state_count = KIRKWOOD_MAX_STATES,
+};
+
+static DEFINE_PER_CPU(struct cpuidle_device, kirkwood_cpuidle_device);
+
 /* Initialize CPU idle by registering the idle states */
 static int kirkwood_init_cpuidle(void)
 {
         struct cpuidle_device *device;
-        struct cpuidle_driver *driver = &kirkwood_idle_driver;
 
         device = &per_cpu(kirkwood_cpuidle_device, smp_processor_id());
         device->state_count = KIRKWOOD_MAX_STATES;
-        driver->state_count = KIRKWOOD_MAX_STATES;
-
-        /* Wait for interrupt state */
-        driver->states[0].enter = kirkwood_enter_idle;
-        driver->states[0].exit_latency = 1;
-        driver->states[0].target_residency = 10000;
-        driver->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[0].name, "WFI");
-        strcpy(driver->states[0].desc, "Wait for interrupt");
-
-        /* Wait for interrupt and DDR self refresh state */
-        driver->states[1].enter = kirkwood_enter_idle;
-        driver->states[1].exit_latency = 10;
-        driver->states[1].target_residency = 10000;
-        driver->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
-        strcpy(driver->states[1].name, "DDR SR");
-        strcpy(driver->states[1].desc, "WFI and DDR Self Refresh");
 
         cpuidle_register_driver(&kirkwood_idle_driver);
         if (cpuidle_register_device(device)) {
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 464cffde58fe..535866489ce3 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -87,29 +87,14 @@ static int _cpuidle_deny_idle(struct powerdomain *pwrdm,
         return 0;
 }
 
-/**
- * omap3_enter_idle - Programs OMAP3 to enter the specified state
- * @dev: cpuidle device
- * @drv: cpuidle driver
- * @index: the index of state to be entered
- *
- * Called from the CPUidle framework to program the device to the
- * specified target state selected by the governor.
- */
-static int omap3_enter_idle(struct cpuidle_device *dev,
+static int __omap3_enter_idle(struct cpuidle_device *dev,
                                 struct cpuidle_driver *drv,
                                 int index)
 {
         struct omap3_idle_statedata *cx =
                         cpuidle_get_statedata(&dev->states_usage[index]);
-        struct timespec ts_preidle, ts_postidle, ts_idle;
         u32 mpu_state = cx->mpu_state, core_state = cx->core_state;
-        int idle_time;
-
-        /* Used to keep track of the total time in idle */
-        getnstimeofday(&ts_preidle);
 
-        local_irq_disable();
         local_fiq_disable();
 
         pwrdm_set_next_pwrst(mpu_pd, mpu_state);
@@ -148,22 +133,29 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
         }
 
 return_sleep_time:
-        getnstimeofday(&ts_postidle);
-        ts_idle = timespec_sub(ts_postidle, ts_preidle);
 
-        local_irq_enable();
         local_fiq_enable();
 
-        idle_time = ts_idle.tv_nsec / NSEC_PER_USEC + ts_idle.tv_sec * \
-                                                                USEC_PER_SEC;
-
-        /* Update cpuidle counters */
-        dev->last_residency = idle_time;
-
         return index;
 }
 
 /**
+ * omap3_enter_idle - Programs OMAP3 to enter the specified state
+ * @dev: cpuidle device
+ * @drv: cpuidle driver
+ * @index: the index of state to be entered
+ *
+ * Called from the CPUidle framework to program the device to the
+ * specified target state selected by the governor.
+ */
+static inline int omap3_enter_idle(struct cpuidle_device *dev,
+                                struct cpuidle_driver *drv,
+                                int index)
+{
+        return cpuidle_wrap_enter(dev, drv, index, __omap3_enter_idle);
+}
+
+/**
  * next_valid_state - Find next valid C-state
  * @dev: cpuidle device
  * @drv: cpuidle driver
diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index 72e018b9b260..f386cbe9c889 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -62,15 +62,9 @@ static int omap4_enter_idle(struct cpuidle_device *dev,
 {
         struct omap4_idle_statedata *cx =
                         cpuidle_get_statedata(&dev->states_usage[index]);
-        struct timespec ts_preidle, ts_postidle, ts_idle;
         u32 cpu1_state;
-        int idle_time;
         int cpu_id = smp_processor_id();
 
-        /* Used to keep track of the total time in idle */
-        getnstimeofday(&ts_preidle);
-
-        local_irq_disable();
         local_fiq_disable();
 
         /*
@@ -128,26 +122,17 @@ static int omap4_enter_idle(struct cpuidle_device *dev,
         if (index > 0)
                 clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu_id);
 
-        getnstimeofday(&ts_postidle);
-        ts_idle = timespec_sub(ts_postidle, ts_preidle);
-
-        local_irq_enable();
         local_fiq_enable();
 
-        idle_time = ts_idle.tv_nsec / NSEC_PER_USEC + ts_idle.tv_sec * \
-                                                                USEC_PER_SEC;
-
-        /* Update cpuidle counters */
-        dev->last_residency = idle_time;
-
         return index;
 }
 
 DEFINE_PER_CPU(struct cpuidle_device, omap4_idle_dev);
 
 struct cpuidle_driver omap4_idle_driver = {
-        .name =         "omap4_idle",
-        .owner =        THIS_MODULE,
+        .name                           = "omap4_idle",
+        .owner                          = THIS_MODULE,
+        .en_core_tk_irqen               = 1,
 };
 
 static inline void _fill_cstate(struct cpuidle_driver *drv,
diff --git a/arch/arm/mach-shmobile/cpuidle.c b/arch/arm/mach-shmobile/cpuidle.c
index 21b09b6455e4..7e6559105d40 100644
--- a/arch/arm/mach-shmobile/cpuidle.c
+++ b/arch/arm/mach-shmobile/cpuidle.c
@@ -13,6 +13,7 @@
 #include <linux/suspend.h>
 #include <linux/module.h>
 #include <linux/err.h>
+#include <asm/cpuidle.h>
 #include <asm/io.h>
 
 static void shmobile_enter_wfi(void)
@@ -28,37 +29,19 @@ static int shmobile_cpuidle_enter(struct cpuidle_device *dev,
                                   struct cpuidle_driver *drv,
                                   int index)
 {
-        ktime_t before, after;
-
-        before = ktime_get();
-
-        local_irq_disable();
-        local_fiq_disable();
-
         shmobile_cpuidle_modes[index]();
 
-        local_irq_enable();
-        local_fiq_enable();
-
-        after = ktime_get();
-        dev->last_residency = ktime_to_ns(ktime_sub(after, before)) >> 10;
-
         return index;
 }
 
 static struct cpuidle_device shmobile_cpuidle_dev;
 static struct cpuidle_driver shmobile_cpuidle_driver = {
-        .name =         "shmobile_cpuidle",
-        .owner =        THIS_MODULE,
-        .states[0] = {
-                .name = "C1",
-                .desc = "WFI",
-                .exit_latency = 1,
-                .target_residency = 1 * 2,
-                .flags = CPUIDLE_FLAG_TIME_VALID,
-        },
-        .safe_state_index = 0, /* C1 */
-        .state_count = 1,
+        .name                   = "shmobile_cpuidle",
+        .owner                  = THIS_MODULE,
+        .en_core_tk_irqen       = 1,
+        .states[0]              = ARM_CPUIDLE_WFI_STATE,
+        .safe_state_index       = 0, /* C1 */
+        .state_count            = 1,
 };
 
 void (*shmobile_cpuidle_setup)(struct cpuidle_driver *drv);