Merge tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:
 "These are a couple of regression fixes, cpuidle menu governor
  optimizations, fixes for ACPI proccessor and battery drivers,
  hibernation fix to avoid problems related to the e820 memory map,
  fixes for a few cpufreq drivers and a new version of the suspend
  profiling tool analyze_suspend.py.

  Specifics:

   - Fix for an ACPI-based device hotplug regression introduced in 3.14
     that causes a kernel panic to trigger when memory hot-remove is
     attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen

   - Fix for a cpufreq regression introduced in 3.16 that triggers a
     "sleeping function called from invalid context" bug in
     dev_pm_opp_init_cpufreq_table() from Stephen Boyd

   - ACPI battery driver fix for a warning message added in 3.16 that
     prints silly stuff sometimes from Mariusz Ceier

   - Hibernation fix for safer handling of mismatches in the 820 memory
     map between the configurations during image creation and during the
     subsequent restore from Chun-Yi Lee

   - ACPI processor driver fix to handle CPU hotplug notifications
     correctly during system suspend/resume from Lan Tianyu

   - Series of four cpuidle menu governor cleanups that also should
     speed it up a bit from Mel Gorman

   - Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little
     cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus
     Pargmann and Uwe Kleine-König

   - Version 3.0 of the analyze_suspend.py suspend profiling tool from
     Todd E Brandt"

* tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / battery: Fix warning message in acpi_battery_get_state()
  PM / tools: analyze_suspend.py: update to v3.0
  cpufreq: arm_big_little: fix module license spec
  cpufreq: speedstep-smi: fix decimal printf specifiers
  ACPI / hotplug: Check scan handlers in acpi_scan_hot_remove()
  cpufreq: OPP: Avoid sleeping while atomic
  cpufreq: cpu0: Do not print error message when deferring
  cpufreq: integrator: Use set_cpus_allowed_ptr
  PM / hibernate: avoid unsafe pages in e820 reserved regions
  ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events
  cpuidle: menu: Lookup CPU runqueues less
  cpuidle: menu: Call nr_iowait_cpu less times
  cpuidle: menu: Use ktime_to_us instead of reinventing the wheel
  cpuidle: menu: Use shifts when calculating averages where possible

3 files changed, 27 insertions, 8 deletions

diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 4fc5c32422b3..c4b8093c80b3 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -954,6 +954,25 @@ static void mark_nosave_pages(struct memory_bitmap *bm)
         }
 }
 
+static bool is_nosave_page(unsigned long pfn)
+{
+        struct nosave_region *region;
+
+        list_for_each_entry(region, &nosave_regions, list) {
+                if (pfn >= region->start_pfn && pfn < region->end_pfn) {
+                        pr_err("PM: %#010llx in e820 nosave region: "
+                               "[mem %#010llx-%#010llx]\n",
+                               (unsigned long long) pfn << PAGE_SHIFT,
+                               (unsigned long long) region->start_pfn << PAGE_SHIFT,
+                               ((unsigned long long) region->end_pfn << PAGE_SHIFT)
+                                        - 1);
+                        return true;
+                }
+        }
+
+        return false;
+}
+
 /**
  *      create_basic_memory_bitmaps - create bitmaps needed for marking page
  *      frames that should not be saved and free page frames.  The pointers
@@ -2015,7 +2034,7 @@ static int mark_unsafe_pages(struct memory_bitmap *bm)
         do {
                 pfn = memory_bm_next_pfn(bm);
                 if (likely(pfn != BM_END_OF_MAP)) {
-                        if (likely(pfn_valid(pfn)))
+                        if (likely(pfn_valid(pfn)) && !is_nosave_page(pfn))
                                 swsusp_set_page_free(pfn_to_page(pfn));
                         else
                                 return -EFAULT;
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1211575a2208..ec1a286684a5 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2393,6 +2393,13 @@ unsigned long nr_iowait_cpu(int cpu)
         return atomic_read(&this->nr_iowait);
 }
 
+void get_iowait_load(unsigned long *nr_waiters, unsigned long *load)
+{
+        struct rq *this = this_rq();
+        *nr_waiters = atomic_read(&this->nr_iowait);
+        *load = this->cpu_load[0];
+}
+
 #ifdef CONFIG_SMP
 
 /*
diff --git a/kernel/sched/proc.c b/kernel/sched/proc.c
index 16f5a30f9c88..8ecd552fe4f2 100644
--- a/kernel/sched/proc.c
+++ b/kernel/sched/proc.c
@@ -8,13 +8,6 @@
 
 #include "sched.h"
 
-unsigned long this_cpu_load(void)
-{
-        struct rq *this = this_rq();
-        return this->cpu_load[0];
-}
-
-
 /*
  * Global load-average calculations
  *