Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

* 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)
  PM / Hibernate: Implement compat_ioctl for /dev/snapshot
  PM / Freezer: fix return value of freezable_schedule_timeout_killable()
  PM / shmobile: Allow the A4R domain to be turned off at run time
  PM / input / touchscreen: Make st1232 use device PM QoS constraints
  PM / QoS: Introduce dev_pm_qos_add_ancestor_request()
  PM / shmobile: Remove the stay_on flag from SH7372's PM domains
  PM / shmobile: Don't include SH7372's INTCS in syscore suspend/resume
  PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode
  PM: Drop generic_subsys_pm_ops
  PM / Sleep: Remove forward-only callbacks from AMBA bus type
  PM / Sleep: Remove forward-only callbacks from platform bus type
  PM: Run the driver callback directly if the subsystem one is not there
  PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers
  PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412.
  PM / Sleep: Merge internal functions in generic_ops.c
  PM / Sleep: Simplify generic system suspend callbacks
  PM / Hibernate: Remove deprecated hibernation snapshot ioctls
  PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled()
  ARM: S3C64XX: Implement basic power domain support
  PM / shmobile: Use common always on power domain governor
  ...

Fix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused
XBT_FORCE_SLEEP bit

1 files changed, 27 insertions, 65 deletions

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index a6b0503574ee..6d6d28870335 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -43,8 +43,6 @@ int in_suspend __nosavedata;
 enum {
         HIBERNATION_INVALID,
         HIBERNATION_PLATFORM,
-        HIBERNATION_TEST,
-        HIBERNATION_TESTPROC,
         HIBERNATION_SHUTDOWN,
         HIBERNATION_REBOOT,
         /* keep last */
@@ -55,7 +53,7 @@ enum {
 
 static int hibernation_mode = HIBERNATION_SHUTDOWN;
 
-static bool freezer_test_done;
+bool freezer_test_done;
 
 static const struct platform_hibernation_ops *hibernation_ops;
 
@@ -71,14 +69,14 @@ void hibernation_set_ops(const struct platform_hibernation_ops *ops)
                 WARN_ON(1);
                 return;
         }
-        mutex_lock(&pm_mutex);
+        lock_system_sleep();
         hibernation_ops = ops;
         if (ops)
                 hibernation_mode = HIBERNATION_PLATFORM;
         else if (hibernation_mode == HIBERNATION_PLATFORM)
                 hibernation_mode = HIBERNATION_SHUTDOWN;
 
-        mutex_unlock(&pm_mutex);
+        unlock_system_sleep();
 }
 
 static bool entering_platform_hibernation;
@@ -96,15 +94,6 @@ static void hibernation_debug_sleep(void)
         mdelay(5000);
 }
 
-static int hibernation_testmode(int mode)
-{
-        if (hibernation_mode == mode) {
-                hibernation_debug_sleep();
-                return 1;
-        }
-        return 0;
-}
-
 static int hibernation_test(int level)
 {
         if (pm_test_level == level) {
@@ -114,7 +103,6 @@ static int hibernation_test(int level)
         return 0;
 }
 #else /* !CONFIG_PM_DEBUG */
-static int hibernation_testmode(int mode) { return 0; }
 static int hibernation_test(int level) { return 0; }
 #endif /* !CONFIG_PM_DEBUG */
 
@@ -278,8 +266,7 @@ static int create_image(int platform_mode)
                 goto Platform_finish;
 
         error = disable_nonboot_cpus();
-        if (error || hibernation_test(TEST_CPUS)
-            || hibernation_testmode(HIBERNATION_TEST))
+        if (error || hibernation_test(TEST_CPUS))
                 goto Enable_cpus;
 
         local_irq_disable();
@@ -333,7 +320,7 @@ static int create_image(int platform_mode)
  */
 int hibernation_snapshot(int platform_mode)
 {
-        pm_message_t msg = PMSG_RECOVER;
+        pm_message_t msg;
         int error;
 
         error = platform_begin(platform_mode);
@@ -349,8 +336,7 @@ int hibernation_snapshot(int platform_mode)
         if (error)
                 goto Cleanup;
 
-        if (hibernation_test(TEST_FREEZER) ||
-                hibernation_testmode(HIBERNATION_TESTPROC)) {
+        if (hibernation_test(TEST_FREEZER)) {
 
                 /*
                  * Indicate to the caller that we are returning due to a
@@ -362,26 +348,26 @@ int hibernation_snapshot(int platform_mode)
 
         error = dpm_prepare(PMSG_FREEZE);
         if (error) {
-                dpm_complete(msg);
+                dpm_complete(PMSG_RECOVER);
                 goto Cleanup;
         }
 
         suspend_console();
         pm_restrict_gfp_mask();
+
         error = dpm_suspend(PMSG_FREEZE);
-        if (error)
-                goto Recover_platform;
 
-        if (hibernation_test(TEST_DEVICES))
-                goto Recover_platform;
+        if (error || hibernation_test(TEST_DEVICES))
+                platform_recover(platform_mode);
+        else
+                error = create_image(platform_mode);
 
-        error = create_image(platform_mode);
         /*
-         * Control returns here (1) after the image has been created or the
+         * In the case that we call create_image() above, the control
+         * returns here (1) after the image has been created or the
          * image creation has failed and (2) after a successful restore.
          */
 
- Resume_devices:
         /* We may need to release the preallocated image pages here. */
         if (error || !in_suspend)
                 swsusp_free();
@@ -399,10 +385,6 @@ int hibernation_snapshot(int platform_mode)
         platform_end(platform_mode);
         return error;
 
- Recover_platform:
-        platform_recover(platform_mode);
-        goto Resume_devices;
-
  Cleanup:
         swsusp_free();
         goto Close;
@@ -590,9 +572,6 @@ int hibernation_platform_enter(void)
 static void power_down(void)
 {
         switch (hibernation_mode) {
-        case HIBERNATION_TEST:
-        case HIBERNATION_TESTPROC:
-                break;
         case HIBERNATION_REBOOT:
                 kernel_restart(NULL);
                 break;
@@ -611,17 +590,6 @@ static void power_down(void)
         while(1);
 }
 
-static int prepare_processes(void)
-{
-        int error = 0;
-
-        if (freeze_processes()) {
-                error = -EBUSY;
-                thaw_processes();
-        }
-        return error;
-}
-
 /**
  * hibernate - Carry out system hibernation, including saving the image.
  */
@@ -629,7 +597,7 @@ int hibernate(void)
 {
         int error;
 
-        mutex_lock(&pm_mutex);
+        lock_system_sleep();
         /* The snapshot device should not be opened while we're running */
         if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
                 error = -EBUSY;
@@ -654,7 +622,7 @@ int hibernate(void)
         sys_sync();
         printk("done.\n");
 
-        error = prepare_processes();
+        error = freeze_processes();
         if (error)
                 goto Finish;
 
@@ -697,7 +665,7 @@ int hibernate(void)
         pm_restore_console();
         atomic_inc(&snapshot_device_available);
  Unlock:
-        mutex_unlock(&pm_mutex);
+        unlock_system_sleep();
         return error;
 }
 
@@ -811,11 +779,13 @@ static int software_resume(void)
                 goto close_finish;
 
         error = create_basic_memory_bitmaps();
-        if (error)
+        if (error) {
+                usermodehelper_enable();
                 goto close_finish;
+        }
 
         pr_debug("PM: Preparing processes for restore.\n");
-        error = prepare_processes();
+        error = freeze_processes();
         if (error) {
                 swsusp_close(FMODE_READ);
                 goto Done;
@@ -855,8 +825,6 @@ static const char * const hibernation_modes[] = {
         [HIBERNATION_PLATFORM]  = "platform",
         [HIBERNATION_SHUTDOWN]  = "shutdown",
         [HIBERNATION_REBOOT]    = "reboot",
-        [HIBERNATION_TEST]      = "test",
-        [HIBERNATION_TESTPROC]  = "testproc",
 };
 
 /*
@@ -865,17 +833,15 @@ static const char * const hibernation_modes[] = {
  * Hibernation can be handled in several ways.  There are a few different ways
  * to put the system into the sleep state: using the platform driver (e.g. ACPI
  * or other hibernation_ops), powering it off or rebooting it (for testing
- * mostly), or using one of the two available test modes.
+ * mostly).
  *
  * The sysfs file /sys/power/disk provides an interface for selecting the
  * hibernation mode to use.  Reading from this file causes the available modes
- * to be printed.  There are 5 modes that can be supported:
+ * to be printed.  There are 3 modes that can be supported:
  *
  *      'platform'
  *      'shutdown'
  *      'reboot'
- *      'test'
- *      'testproc'
  *
  * If a platform hibernation driver is in use, 'platform' will be supported
  * and will be used by default.  Otherwise, 'shutdown' will be used by default.
@@ -899,8 +865,6 @@ static ssize_t disk_show(struct kobject *kobj, struct kobj_attribute *attr,
                 switch (i) {
                 case HIBERNATION_SHUTDOWN:
                 case HIBERNATION_REBOOT:
-                case HIBERNATION_TEST:
-                case HIBERNATION_TESTPROC:
                         break;
                 case HIBERNATION_PLATFORM:
                         if (hibernation_ops)
@@ -929,7 +893,7 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
         p = memchr(buf, '\n', n);
         len = p ? p - buf : n;
 
-        mutex_lock(&pm_mutex);
+        lock_system_sleep();
         for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
                 if (len == strlen(hibernation_modes[i])
                     && !strncmp(buf, hibernation_modes[i], len)) {
@@ -941,8 +905,6 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
                 switch (mode) {
                 case HIBERNATION_SHUTDOWN:
                 case HIBERNATION_REBOOT:
-                case HIBERNATION_TEST:
-                case HIBERNATION_TESTPROC:
                         hibernation_mode = mode;
                         break;
                 case HIBERNATION_PLATFORM:
@@ -957,7 +919,7 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
         if (!error)
                 pr_debug("PM: Hibernation mode set to '%s'\n",
                          hibernation_modes[mode]);
-        mutex_unlock(&pm_mutex);
+        unlock_system_sleep();
         return error ? error : n;
 }
 
@@ -984,9 +946,9 @@ static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
         if (maj != MAJOR(res) || min != MINOR(res))
                 goto out;
 
-        mutex_lock(&pm_mutex);
+        lock_system_sleep();
         swsusp_resume_device = res;
-        mutex_unlock(&pm_mutex);
+        unlock_system_sleep();
         printk(KERN_INFO "PM: Starting manual resume from disk\n");
         noresume = 0;
         software_resume();